Home / 129,387.04-178,559.24-72,028.91

Finding the Fourth Proportional to 129,387.04, 178,559.24 and 72,028.91

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Solution

The fourth proportional to 129,387.04, 178,559.24 and 72,028.91 is: 99,402.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,387.04 : 178,559.24 = 72,028.91 : x
  2. Step 2: Convert to fraction form
    129,387.04/178,559.24 = 72,028.91/x
  3. Step 3: Cross multiply
    129,387.04x = 178,559.24 × 72,028.91
  4. Step 4: Simplify right side
    129,387.04x = 12,861,427,513.88
  5. Step 5: Solve for x
    x = 12,861,427,513.88/129,387.04
  6. Step 6: Final answer
    x = 99,402.75

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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.