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Finding the Fourth Proportional to 100,637.12, 138,868.07 and 60,352.58

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Solution

The fourth proportional to 100,637.12, 138,868.07 and 60,352.58 is: 83,279.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,637.12 : 138,868.07 = 60,352.58 : x
  2. Step 2: Convert to fraction form
    100,637.12/138,868.07 = 60,352.58/x
  3. Step 3: Cross multiply
    100,637.12x = 138,868.07 × 60,352.58
  4. Step 4: Simplify right side
    100,637.12x = 8,381,045,308.02
  5. Step 5: Solve for x
    x = 8,381,045,308.02/100,637.12
  6. Step 6: Final answer
    x = 83,279.86

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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.