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Finding the Fourth Proportional to 61,146.66, 91,729.11 and 21,700.47

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Solution

The fourth proportional to 61,146.66, 91,729.11 and 21,700.47 is: 32,553.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,146.66 : 91,729.11 = 21,700.47 : x
  2. Step 2: Convert to fraction form
    61,146.66/91,729.11 = 21,700.47/x
  3. Step 3: Cross multiply
    61,146.66x = 91,729.11 × 21,700.47
  4. Step 4: Simplify right side
    61,146.66x = 1,990,564,799.68
  5. Step 5: Solve for x
    x = 1,990,564,799.68/61,146.66
  6. Step 6: Final answer
    x = 32,553.94

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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.