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Finding the Fourth Proportional to 90,127.80, 134,908.20 and 61,882.56

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Solution

The fourth proportional to 90,127.80, 134,908.20 and 61,882.56 is: 92,629.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,127.80 : 134,908.20 = 61,882.56 : x
  2. Step 2: Convert to fraction form
    90,127.80/134,908.20 = 61,882.56/x
  3. Step 3: Cross multiply
    90,127.80x = 134,908.20 × 61,882.56
  4. Step 4: Simplify right side
    90,127.80x = 8,348,464,780.99
  5. Step 5: Solve for x
    x = 8,348,464,780.99/90,127.80
  6. Step 6: Final answer
    x = 92,629.19

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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.