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Finding the Fourth Proportional to 90,854.20, 136,022.10 and 80,486.20

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Solution

The fourth proportional to 90,854.20, 136,022.10 and 80,486.20 is: 120,499.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,854.20 : 136,022.10 = 80,486.20 : x
  2. Step 2: Convert to fraction form
    90,854.20/136,022.10 = 80,486.20/x
  3. Step 3: Cross multiply
    90,854.20x = 136,022.10 × 80,486.20
  4. Step 4: Simplify right side
    90,854.20x = 10,947,901,945.02
  5. Step 5: Solve for x
    x = 10,947,901,945.02/90,854.20
  6. Step 6: Final answer
    x = 120,499.68

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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.