Home / 129,146.46-178,220.96-71,784.32

Finding the Fourth Proportional to 129,146.46, 178,220.96 and 71,784.32

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Solution

The fourth proportional to 129,146.46, 178,220.96 and 71,784.32 is: 99,061.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,146.46 : 178,220.96 = 71,784.32 : x
  2. Step 2: Convert to fraction form
    129,146.46/178,220.96 = 71,784.32/x
  3. Step 3: Cross multiply
    129,146.46x = 178,220.96 × 71,784.32
  4. Step 4: Simplify right side
    129,146.46x = 12,793,470,423.35
  5. Step 5: Solve for x
    x = 12,793,470,423.35/129,146.46
  6. Step 6: Final answer
    x = 99,061.72

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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.