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Finding the Fourth Proportional to 61,211.80, 84,480.53 and 34,355.78

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Solution

The fourth proportional to 61,211.80, 84,480.53 and 34,355.78 is: 47,415.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,211.80 : 84,480.53 = 34,355.78 : x
  2. Step 2: Convert to fraction form
    61,211.80/84,480.53 = 34,355.78/x
  3. Step 3: Cross multiply
    61,211.80x = 84,480.53 × 34,355.78
  4. Step 4: Simplify right side
    61,211.80x = 2,902,394,354.42
  5. Step 5: Solve for x
    x = 2,902,394,354.42/61,211.80
  6. Step 6: Final answer
    x = 47,415.60

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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.