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Finding the Fourth Proportional to 66,531.86, 99,759.42 and 45,497.37

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Solution

The fourth proportional to 66,531.86, 99,759.42 and 45,497.37 is: 68,219.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,531.86 : 99,759.42 = 45,497.37 : x
  2. Step 2: Convert to fraction form
    66,531.86/99,759.42 = 45,497.37/x
  3. Step 3: Cross multiply
    66,531.86x = 99,759.42 × 45,497.37
  4. Step 4: Simplify right side
    66,531.86x = 4,538,791,242.73
  5. Step 5: Solve for x
    x = 4,538,791,242.73/66,531.86
  6. Step 6: Final answer
    x = 68,219.82

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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.