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Finding the Fourth Proportional to 169,704.60, 254,211.30 and 86,645.40

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Solution

The fourth proportional to 169,704.60, 254,211.30 and 86,645.40 is: 129,791.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,704.60 : 254,211.30 = 86,645.40 : x
  2. Step 2: Convert to fraction form
    169,704.60/254,211.30 = 86,645.40/x
  3. Step 3: Cross multiply
    169,704.60x = 254,211.30 × 86,645.40
  4. Step 4: Simplify right side
    169,704.60x = 22,026,239,773.02
  5. Step 5: Solve for x
    x = 22,026,239,773.02/169,704.60
  6. Step 6: Final answer
    x = 129,791.65

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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.