Home / 90,691.20-136,036.80-89,816.40

Finding the Fourth Proportional to 90,691.20, 136,036.80 and 89,816.40

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Solution

The fourth proportional to 90,691.20, 136,036.80 and 89,816.40 is: 134,724.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,691.20 : 136,036.80 = 89,816.40 : x
  2. Step 2: Convert to fraction form
    90,691.20/136,036.80 = 89,816.40/x
  3. Step 3: Cross multiply
    90,691.20x = 136,036.80 × 89,816.40
  4. Step 4: Simplify right side
    90,691.20x = 12,218,335,643.52
  5. Step 5: Solve for x
    x = 12,218,335,643.52/90,691.20
  6. Step 6: Final answer
    x = 134,724.60

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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.