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Finding the Fourth Proportional to 90,017.40, 134,766.90 and 80,686.20

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Solution

The fourth proportional to 90,017.40, 134,766.90 and 80,686.20 is: 120,796.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,017.40 : 134,766.90 = 80,686.20 : x
  2. Step 2: Convert to fraction form
    90,017.40/134,766.90 = 80,686.20/x
  3. Step 3: Cross multiply
    90,017.40x = 134,766.90 × 80,686.20
  4. Step 4: Simplify right side
    90,017.40x = 10,873,829,046.78
  5. Step 5: Solve for x
    x = 10,873,829,046.78/90,017.40
  6. Step 6: Final answer
    x = 120,796.97

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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.