Home / 90,641.20-135,961.80-89,985.10

Finding the Fourth Proportional to 90,641.20, 135,961.80 and 89,985.10

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Solution

The fourth proportional to 90,641.20, 135,961.80 and 89,985.10 is: 134,977.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,641.20 : 135,961.80 = 89,985.10 : x
  2. Step 2: Convert to fraction form
    90,641.20/135,961.80 = 89,985.10/x
  3. Step 3: Cross multiply
    90,641.20x = 135,961.80 × 89,985.10
  4. Step 4: Simplify right side
    90,641.20x = 12,234,536,169.18
  5. Step 5: Solve for x
    x = 12,234,536,169.18/90,641.20
  6. Step 6: Final answer
    x = 134,977.65

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Similar ratio
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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.