Home / 129,057,611,310.90-178,100,057,305.76-70,397,711,631.72

Finding the Fourth Proportional to 129,057,611,310.90, 178,100,057,305.76 and 70,397,711,631.72

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Solution

The fourth proportional to 129,057,611,310.90, 178,100,057,305.76 and 70,397,711,631.72 is: 97,149,144,079.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,057,611,310.90 : 178,100,057,305.76 = 70,397,711,631.72 : x
  2. Step 2: Convert to fraction form
    129,057,611,310.90/178,100,057,305.76 = 70,397,711,631.72/x
  3. Step 3: Cross multiply
    129,057,611,310.90x = 178,100,057,305.76 × 70,397,711,631.72
  4. Step 4: Simplify right side
    129,057,611,310.90x = 12,537,836,475,803,699,773,440
  5. Step 5: Solve for x
    x = 12,537,836,475,803,699,773,440/129,057,611,310.90
  6. Step 6: Final answer
    x = 97,149,144,079.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.