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Finding the Fourth Proportional to 121,446.70, 181,951.35 and 74,644.90

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Solution

The fourth proportional to 121,446.70, 181,951.35 and 74,644.90 is: 111,832.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,446.70 : 181,951.35 = 74,644.90 : x
  2. Step 2: Convert to fraction form
    121,446.70/181,951.35 = 74,644.90/x
  3. Step 3: Cross multiply
    121,446.70x = 181,951.35 × 74,644.90
  4. Step 4: Simplify right side
    121,446.70x = 13,581,740,325.62
  5. Step 5: Solve for x
    x = 13,581,740,325.62/121,446.70
  6. Step 6: Final answer
    x = 111,832.93

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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.