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Finding the Fourth Proportional to 90,624.30, 135,936.45 and 67,296.30

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Solution

The fourth proportional to 90,624.30, 135,936.45 and 67,296.30 is: 100,944.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,624.30 : 135,936.45 = 67,296.30 : x
  2. Step 2: Convert to fraction form
    90,624.30/135,936.45 = 67,296.30/x
  3. Step 3: Cross multiply
    90,624.30x = 135,936.45 × 67,296.30
  4. Step 4: Simplify right side
    90,624.30x = 9,148,020,120.14
  5. Step 5: Solve for x
    x = 9,148,020,120.14/90,624.30
  6. Step 6: Final answer
    x = 100,944.45

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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.