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Finding the Fourth Proportional to 129,425.98, 178,572.98 and 75,724.19

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Solution

The fourth proportional to 129,425.98, 178,572.98 and 75,724.19 is: 104,478.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,425.98 : 178,572.98 = 75,724.19 : x
  2. Step 2: Convert to fraction form
    129,425.98/178,572.98 = 75,724.19/x
  3. Step 3: Cross multiply
    129,425.98x = 178,572.98 × 75,724.19
  4. Step 4: Simplify right side
    129,425.98x = 13,522,293,887.77
  5. Step 5: Solve for x
    x = 13,522,293,887.77/129,425.98
  6. Step 6: Final answer
    x = 104,478.98

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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.