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Finding the Fourth Proportional to 72,442.69, 108,652.34 and 19,839.87

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Solution

The fourth proportional to 72,442.69, 108,652.34 and 19,839.87 is: 29,756.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,442.69 : 108,652.34 = 19,839.87 : x
  2. Step 2: Convert to fraction form
    72,442.69/108,652.34 = 19,839.87/x
  3. Step 3: Cross multiply
    72,442.69x = 108,652.34 × 19,839.87
  4. Step 4: Simplify right side
    72,442.69x = 2,155,648,350.40
  5. Step 5: Solve for x
    x = 2,155,648,350.40/72,442.69
  6. Step 6: Final answer
    x = 29,756.60

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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.