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Finding the Fourth Proportional to 120,088.80, 165,708.16 and 66,370.56

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Solution

The fourth proportional to 120,088.80, 165,708.16 and 66,370.56 is: 91,583.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,088.80 : 165,708.16 = 66,370.56 : x
  2. Step 2: Convert to fraction form
    120,088.80/165,708.16 = 66,370.56/x
  3. Step 3: Cross multiply
    120,088.80x = 165,708.16 × 66,370.56
  4. Step 4: Simplify right side
    120,088.80x = 10,998,143,375.77
  5. Step 5: Solve for x
    x = 10,998,143,375.77/120,088.80
  6. Step 6: Final answer
    x = 91,583.42

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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.