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Finding the Fourth Proportional to 90,197.80, 124,470.48 and 49,913.28

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Solution

The fourth proportional to 90,197.80, 124,470.48 and 49,913.28 is: 68,878.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,197.80 : 124,470.48 = 49,913.28 : x
  2. Step 2: Convert to fraction form
    90,197.80/124,470.48 = 49,913.28/x
  3. Step 3: Cross multiply
    90,197.80x = 124,470.48 × 49,913.28
  4. Step 4: Simplify right side
    90,197.80x = 6,212,729,919.97
  5. Step 5: Solve for x
    x = 6,212,729,919.97/90,197.80
  6. Step 6: Final answer
    x = 68,878.95

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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.