Home / 90,781.20-136,171.80-59,288.40

Finding the Fourth Proportional to 90,781.20, 136,171.80 and 59,288.40

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Solution

The fourth proportional to 90,781.20, 136,171.80 and 59,288.40 is: 88,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,781.20 : 136,171.80 = 59,288.40 : x
  2. Step 2: Convert to fraction form
    90,781.20/136,171.80 = 59,288.40/x
  3. Step 3: Cross multiply
    90,781.20x = 136,171.80 × 59,288.40
  4. Step 4: Simplify right side
    90,781.20x = 8,073,408,147.12
  5. Step 5: Solve for x
    x = 8,073,408,147.12/90,781.20
  6. Step 6: Final answer
    x = 88,932.60

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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.