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Finding the Fourth Proportional to 61,419.78, 84,805.50 and 60,438.90

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Solution

The fourth proportional to 61,419.78, 84,805.50 and 60,438.90 is: 83,451.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,419.78 : 84,805.50 = 60,438.90 : x
  2. Step 2: Convert to fraction form
    61,419.78/84,805.50 = 60,438.90/x
  3. Step 3: Cross multiply
    61,419.78x = 84,805.50 × 60,438.90
  4. Step 4: Simplify right side
    61,419.78x = 5,125,551,133.95
  5. Step 5: Solve for x
    x = 5,125,551,133.95/61,419.78
  6. Step 6: Final answer
    x = 83,451.15

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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.