Home / 129,363.66-178,520.49-72,002.12

Finding the Fourth Proportional to 129,363.66, 178,520.49 and 72,002.12

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Solution

The fourth proportional to 129,363.66, 178,520.49 and 72,002.12 is: 99,362.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,363.66 : 178,520.49 = 72,002.12 : x
  2. Step 2: Convert to fraction form
    129,363.66/178,520.49 = 72,002.12/x
  3. Step 3: Cross multiply
    129,363.66x = 178,520.49 × 72,002.12
  4. Step 4: Simplify right side
    129,363.66x = 12,853,852,850.84
  5. Step 5: Solve for x
    x = 12,853,852,850.84/129,363.66
  6. Step 6: Final answer
    x = 99,362.16

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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.