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Finding the Fourth Proportional to 101,640.18, 151,877.85 and 77,491.65

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Solution

The fourth proportional to 101,640.18, 151,877.85 and 77,491.65 is: 115,793.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,640.18 : 151,877.85 = 77,491.65 : x
  2. Step 2: Convert to fraction form
    101,640.18/151,877.85 = 77,491.65/x
  3. Step 3: Cross multiply
    101,640.18x = 151,877.85 × 77,491.65
  4. Step 4: Simplify right side
    101,640.18x = 11,769,265,194.95
  5. Step 5: Solve for x
    x = 11,769,265,194.95/101,640.18
  6. Step 6: Final answer
    x = 115,793.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.