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Finding the Fourth Proportional to 123,432.70, 185,149.05 and 113,809.90

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Solution

The fourth proportional to 123,432.70, 185,149.05 and 113,809.90 is: 170,714.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,432.70 : 185,149.05 = 113,809.90 : x
  2. Step 2: Convert to fraction form
    123,432.70/185,149.05 = 113,809.90/x
  3. Step 3: Cross multiply
    123,432.70x = 185,149.05 × 113,809.90
  4. Step 4: Simplify right side
    123,432.70x = 21,071,794,865.60
  5. Step 5: Solve for x
    x = 21,071,794,865.60/123,432.70
  6. Step 6: Final answer
    x = 170,714.85

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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.