Home / 129,371.55-178,528.10-72,008.97

Finding the Fourth Proportional to 129,371.55, 178,528.10 and 72,008.97

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Solution

The fourth proportional to 129,371.55, 178,528.10 and 72,008.97 is: 99,369.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,371.55 : 178,528.10 = 72,008.97 : x
  2. Step 2: Convert to fraction form
    129,371.55/178,528.10 = 72,008.97/x
  3. Step 3: Cross multiply
    129,371.55x = 178,528.10 × 72,008.97
  4. Step 4: Simplify right side
    129,371.55x = 12,855,624,237.01
  5. Step 5: Solve for x
    x = 12,855,624,237.01/129,371.55
  6. Step 6: Final answer
    x = 99,369.79

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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.