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Finding the Fourth Proportional to 60,781.47, 91,212.92 and 21,338.70

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Solution

The fourth proportional to 60,781.47, 91,212.92 and 21,338.70 is: 32,022.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,781.47 : 91,212.92 = 21,338.70 : x
  2. Step 2: Convert to fraction form
    60,781.47/91,212.92 = 21,338.70/x
  3. Step 3: Cross multiply
    60,781.47x = 91,212.92 × 21,338.70
  4. Step 4: Simplify right side
    60,781.47x = 1,946,365,136.00
  5. Step 5: Solve for x
    x = 1,946,365,136.00/60,781.47
  6. Step 6: Final answer
    x = 32,022.34

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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.