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Finding the Fourth Proportional to 100,262.80, 138,325.48 and 64,472.55

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Solution

The fourth proportional to 100,262.80, 138,325.48 and 64,472.55 is: 88,948.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,262.80 : 138,325.48 = 64,472.55 : x
  2. Step 2: Convert to fraction form
    100,262.80/138,325.48 = 64,472.55/x
  3. Step 3: Cross multiply
    100,262.80x = 138,325.48 × 64,472.55
  4. Step 4: Simplify right side
    100,262.80x = 8,918,196,425.57
  5. Step 5: Solve for x
    x = 8,918,196,425.57/100,262.80
  6. Step 6: Final answer
    x = 88,948.21

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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.