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Finding the Fourth Proportional to 90,997.20, 136,495.80 and 83,998.80

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Solution

The fourth proportional to 90,997.20, 136,495.80 and 83,998.80 is: 125,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,997.20 : 136,495.80 = 83,998.80 : x
  2. Step 2: Convert to fraction form
    90,997.20/136,495.80 = 83,998.80/x
  3. Step 3: Cross multiply
    90,997.20x = 136,495.80 × 83,998.80
  4. Step 4: Simplify right side
    90,997.20x = 11,465,483,405.04
  5. Step 5: Solve for x
    x = 11,465,483,405.04/90,997.20
  6. Step 6: Final answer
    x = 125,998.20

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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.