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Finding the Fourth Proportional to 72,435.10, 108,652.65 and 63,679.90

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Solution

The fourth proportional to 72,435.10, 108,652.65 and 63,679.90 is: 95,519.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,435.10 : 108,652.65 = 63,679.90 : x
  2. Step 2: Convert to fraction form
    72,435.10/108,652.65 = 63,679.90/x
  3. Step 3: Cross multiply
    72,435.10x = 108,652.65 × 63,679.90
  4. Step 4: Simplify right side
    72,435.10x = 6,918,989,886.74
  5. Step 5: Solve for x
    x = 6,918,989,886.74/72,435.10
  6. Step 6: Final answer
    x = 95,519.85

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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.