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Finding the Fourth Proportional to 90,611.97, 125,043.78 and 49,776.78

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Solution

The fourth proportional to 90,611.97, 125,043.78 and 49,776.78 is: 68,691.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,611.97 : 125,043.78 = 49,776.78 : x
  2. Step 2: Convert to fraction form
    90,611.97/125,043.78 = 49,776.78/x
  3. Step 3: Cross multiply
    90,611.97x = 125,043.78 × 49,776.78
  4. Step 4: Simplify right side
    90,611.97x = 6,224,276,727.43
  5. Step 5: Solve for x
    x = 6,224,276,727.43/90,611.97
  6. Step 6: Final answer
    x = 68,691.55

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1.5x scale

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.