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Finding the Fourth Proportional to 91,600.80, 137,401.20 and 75,854.40

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Solution

The fourth proportional to 91,600.80, 137,401.20 and 75,854.40 is: 113,781.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,600.80 : 137,401.20 = 75,854.40 : x
  2. Step 2: Convert to fraction form
    91,600.80/137,401.20 = 75,854.40/x
  3. Step 3: Cross multiply
    91,600.80x = 137,401.20 × 75,854.40
  4. Step 4: Simplify right side
    91,600.80x = 10,422,485,585.28
  5. Step 5: Solve for x
    x = 10,422,485,585.28/91,600.80
  6. Step 6: Final answer
    x = 113,781.60

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1.5x scale

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.