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Finding the Fourth Proportional to 90,011.52, 124,223.16 and 49,728.80

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Solution

The fourth proportional to 90,011.52, 124,223.16 and 49,728.80 is: 68,629.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,011.52 : 124,223.16 = 49,728.80 : x
  2. Step 2: Convert to fraction form
    90,011.52/124,223.16 = 49,728.80/x
  3. Step 3: Cross multiply
    90,011.52x = 124,223.16 × 49,728.80
  4. Step 4: Simplify right side
    90,011.52x = 6,177,468,057.89
  5. Step 5: Solve for x
    x = 6,177,468,057.89/90,011.52
  6. Step 6: Final answer
    x = 68,629.75

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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.