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Finding the Fourth Proportional to 169,686.90, 254,585.71 and 80,928.87

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Solution

The fourth proportional to 169,686.90, 254,585.71 and 80,928.87 is: 121,419.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,686.90 : 254,585.71 = 80,928.87 : x
  2. Step 2: Convert to fraction form
    169,686.90/254,585.71 = 80,928.87/x
  3. Step 3: Cross multiply
    169,686.90x = 254,585.71 × 80,928.87
  4. Step 4: Simplify right side
    169,686.90x = 20,603,334,179.34
  5. Step 5: Solve for x
    x = 20,603,334,179.34/169,686.90
  6. Step 6: Final answer
    x = 121,419.71

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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.