Home / 129,491.13-178,701.41-72,902.50

Finding the Fourth Proportional to 129,491.13, 178,701.41 and 72,902.50

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Solution

The fourth proportional to 129,491.13, 178,701.41 and 72,902.50 is: 100,607.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,491.13 : 178,701.41 = 72,902.50 : x
  2. Step 2: Convert to fraction form
    129,491.13/178,701.41 = 72,902.50/x
  3. Step 3: Cross multiply
    129,491.13x = 178,701.41 × 72,902.50
  4. Step 4: Simplify right side
    129,491.13x = 13,027,779,542.53
  5. Step 5: Solve for x
    x = 13,027,779,542.53/129,491.13
  6. Step 6: Final answer
    x = 100,607.51

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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.