Home / 90,839.40-136,259.10-71,134.80

Finding the Fourth Proportional to 90,839.40, 136,259.10 and 71,134.80

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Solution

The fourth proportional to 90,839.40, 136,259.10 and 71,134.80 is: 106,702.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,839.40 : 136,259.10 = 71,134.80 : x
  2. Step 2: Convert to fraction form
    90,839.40/136,259.10 = 71,134.80/x
  3. Step 3: Cross multiply
    90,839.40x = 136,259.10 × 71,134.80
  4. Step 4: Simplify right side
    90,839.40x = 9,692,763,826.68
  5. Step 5: Solve for x
    x = 9,692,763,826.68/90,839.40
  6. Step 6: Final answer
    x = 106,702.20

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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.