Home / 129,321.28-178,464.99-72,732.66

Finding the Fourth Proportional to 129,321.28, 178,464.99 and 72,732.66

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Solution

The fourth proportional to 129,321.28, 178,464.99 and 72,732.66 is: 100,371.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,321.28 : 178,464.99 = 72,732.66 : x
  2. Step 2: Convert to fraction form
    129,321.28/178,464.99 = 72,732.66/x
  3. Step 3: Cross multiply
    129,321.28x = 178,464.99 × 72,732.66
  4. Step 4: Simplify right side
    129,321.28x = 12,980,233,439.57
  5. Step 5: Solve for x
    x = 12,980,233,439.57/129,321.28
  6. Step 6: Final answer
    x = 100,371.98

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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.