Home / 90,947.20-136,445.10-81,154.30

Finding the Fourth Proportional to 90,947.20, 136,445.10 and 81,154.30

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Solution

The fourth proportional to 90,947.20, 136,445.10 and 81,154.30 is: 121,753.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,947.20 : 136,445.10 = 81,154.30 : x
  2. Step 2: Convert to fraction form
    90,947.20/136,445.10 = 81,154.30/x
  3. Step 3: Cross multiply
    90,947.20x = 136,445.10 × 81,154.30
  4. Step 4: Simplify right side
    90,947.20x = 11,073,106,578.93
  5. Step 5: Solve for x
    x = 11,073,106,578.93/90,947.20
  6. Step 6: Final answer
    x = 121,753.13

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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.