Home / 129,342.28-178,490.52-72,753.64

Finding the Fourth Proportional to 129,342.28, 178,490.52 and 72,753.64

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Solution

The fourth proportional to 129,342.28, 178,490.52 and 72,753.64 is: 100,399.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,342.28 : 178,490.52 = 72,753.64 : x
  2. Step 2: Convert to fraction form
    129,342.28/178,490.52 = 72,753.64/x
  3. Step 3: Cross multiply
    129,342.28x = 178,490.52 × 72,753.64
  4. Step 4: Simplify right side
    129,342.28x = 12,985,835,035.49
  5. Step 5: Solve for x
    x = 12,985,835,035.49/129,342.28
  6. Step 6: Final answer
    x = 100,399.00

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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.