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Finding the Fourth Proportional to 90,159.87, 124,419.56 and 49,870.47

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Solution

The fourth proportional to 90,159.87, 124,419.56 and 49,870.47 is: 68,820.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,159.87 : 124,419.56 = 49,870.47 : x
  2. Step 2: Convert to fraction form
    90,159.87/124,419.56 = 49,870.47/x
  3. Step 3: Cross multiply
    90,159.87x = 124,419.56 × 49,870.47
  4. Step 4: Simplify right side
    90,159.87x = 6,204,861,685.04
  5. Step 5: Solve for x
    x = 6,204,861,685.04/90,159.87
  6. Step 6: Final answer
    x = 68,820.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.