Home / 129,008.28-178,057.62-74,562.76

Finding the Fourth Proportional to 129,008.28, 178,057.62 and 74,562.76

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Solution

The fourth proportional to 129,008.28, 178,057.62 and 74,562.76 is: 102,911.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,008.28 : 178,057.62 = 74,562.76 : x
  2. Step 2: Convert to fraction form
    129,008.28/178,057.62 = 74,562.76/x
  3. Step 3: Cross multiply
    129,008.28x = 178,057.62 × 74,562.76
  4. Step 4: Simplify right side
    129,008.28x = 13,276,468,310.99
  5. Step 5: Solve for x
    x = 13,276,468,310.99/129,008.28
  6. Step 6: Final answer
    x = 102,911.75

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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.