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Finding the Fourth Proportional to 80,759.25, 121,143.74 and 25,355.25

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Solution

The fourth proportional to 80,759.25, 121,143.74 and 25,355.25 is: 38,034.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,759.25 : 121,143.74 = 25,355.25 : x
  2. Step 2: Convert to fraction form
    80,759.25/121,143.74 = 25,355.25/x
  3. Step 3: Cross multiply
    80,759.25x = 121,143.74 × 25,355.25
  4. Step 4: Simplify right side
    80,759.25x = 3,071,629,686.86
  5. Step 5: Solve for x
    x = 3,071,629,686.86/80,759.25
  6. Step 6: Final answer
    x = 38,034.40

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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.