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Finding the Fourth Proportional to 107,751.66, 148,710.87 and 65,304.78

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Solution

The fourth proportional to 107,751.66, 148,710.87 and 65,304.78 is: 90,128.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,751.66 : 148,710.87 = 65,304.78 : x
  2. Step 2: Convert to fraction form
    107,751.66/148,710.87 = 65,304.78/x
  3. Step 3: Cross multiply
    107,751.66x = 148,710.87 × 65,304.78
  4. Step 4: Simplify right side
    107,751.66x = 9,711,530,648.96
  5. Step 5: Solve for x
    x = 9,711,530,648.96/107,751.66
  6. Step 6: Final answer
    x = 90,128.83

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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.