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Finding the Fourth Proportional to 90,371.84, 135,373.68 and 42,842.87

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Solution

The fourth proportional to 90,371.84, 135,373.68 and 42,842.87 is: 64,177.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,371.84 : 135,373.68 = 42,842.87 : x
  2. Step 2: Convert to fraction form
    90,371.84/135,373.68 = 42,842.87/x
  3. Step 3: Cross multiply
    90,371.84x = 135,373.68 × 42,842.87
  4. Step 4: Simplify right side
    90,371.84x = 5,799,796,296.79
  5. Step 5: Solve for x
    x = 5,799,796,296.79/90,371.84
  6. Step 6: Final answer
    x = 64,177.03

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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.