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Finding the Fourth Proportional to 129,596.76, 178,724.91 and 88,820.15

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Solution

The fourth proportional to 129,596.76, 178,724.91 and 88,820.15 is: 122,490.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,596.76 : 178,724.91 = 88,820.15 : x
  2. Step 2: Convert to fraction form
    129,596.76/178,724.91 = 88,820.15/x
  3. Step 3: Cross multiply
    129,596.76x = 178,724.91 × 88,820.15
  4. Step 4: Simplify right side
    129,596.76x = 15,874,372,004.97
  5. Step 5: Solve for x
    x = 15,874,372,004.97/129,596.76
  6. Step 6: Final answer
    x = 122,490.50

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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.