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Finding the Fourth Proportional to 120,387.16, 180,755.70 and 88,894.36

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Solution

The fourth proportional to 120,387.16, 180,755.70 and 88,894.36 is: 133,470.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,387.16 : 180,755.70 = 88,894.36 : x
  2. Step 2: Convert to fraction form
    120,387.16/180,755.70 = 88,894.36/x
  3. Step 3: Cross multiply
    120,387.16x = 180,755.70 × 88,894.36
  4. Step 4: Simplify right side
    120,387.16x = 16,068,162,267.85
  5. Step 5: Solve for x
    x = 16,068,162,267.85/120,387.16
  6. Step 6: Final answer
    x = 133,470.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.