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Finding the Fourth Proportional to 66,597.31, 99,878.95 and 19,839.25

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Solution

The fourth proportional to 66,597.31, 99,878.95 and 19,839.25 is: 29,753.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,597.31 : 99,878.95 = 19,839.25 : x
  2. Step 2: Convert to fraction form
    66,597.31/99,878.95 = 19,839.25/x
  3. Step 3: Cross multiply
    66,597.31x = 99,878.95 × 19,839.25
  4. Step 4: Simplify right side
    66,597.31x = 1,981,523,458.79
  5. Step 5: Solve for x
    x = 1,981,523,458.79/66,597.31
  6. Step 6: Final answer
    x = 29,753.81

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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.