Home / 90,817.20-135,966.60-80,449.20

Finding the Fourth Proportional to 90,817.20, 135,966.60 and 80,449.20

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Solution

The fourth proportional to 90,817.20, 135,966.60 and 80,449.20 is: 120,444.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,817.20 : 135,966.60 = 80,449.20 : x
  2. Step 2: Convert to fraction form
    90,817.20/135,966.60 = 80,449.20/x
  3. Step 3: Cross multiply
    90,817.20x = 135,966.60 × 80,449.20
  4. Step 4: Simplify right side
    90,817.20x = 10,938,404,196.72
  5. Step 5: Solve for x
    x = 10,938,404,196.72/90,817.20
  6. Step 6: Final answer
    x = 120,444.19

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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.