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Finding the Fourth Proportional to 129,700.32, 178,986.32 and 70,084.32

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Solution

The fourth proportional to 129,700.32, 178,986.32 and 70,084.32 is: 96,716.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,700.32 : 178,986.32 = 70,084.32 : x
  2. Step 2: Convert to fraction form
    129,700.32/178,986.32 = 70,084.32/x
  3. Step 3: Cross multiply
    129,700.32x = 178,986.32 × 70,084.32
  4. Step 4: Simplify right side
    129,700.32x = 12,544,134,526.50
  5. Step 5: Solve for x
    x = 12,544,134,526.50/129,700.32
  6. Step 6: Final answer
    x = 96,716.30

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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.