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Finding the Fourth Proportional to 123,087.60, 169,860.85 and 66,498.98

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Solution

The fourth proportional to 123,087.60, 169,860.85 and 66,498.98 is: 91,768.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,087.60 : 169,860.85 = 66,498.98 : x
  2. Step 2: Convert to fraction form
    123,087.60/169,860.85 = 66,498.98/x
  3. Step 3: Cross multiply
    123,087.60x = 169,860.85 × 66,498.98
  4. Step 4: Simplify right side
    123,087.60x = 11,295,572,251.38
  5. Step 5: Solve for x
    x = 11,295,572,251.38/123,087.60
  6. Step 6: Final answer
    x = 91,768.56

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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.