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Finding the Fourth Proportional to 72,057.65, 107,957.07 and 43,963.20

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Solution

The fourth proportional to 72,057.65, 107,957.07 and 43,963.20 is: 65,865.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,057.65 : 107,957.07 = 43,963.20 : x
  2. Step 2: Convert to fraction form
    72,057.65/107,957.07 = 43,963.20/x
  3. Step 3: Cross multiply
    72,057.65x = 107,957.07 × 43,963.20
  4. Step 4: Simplify right side
    72,057.65x = 4,746,138,259.82
  5. Step 5: Solve for x
    x = 4,746,138,259.82/72,057.65
  6. Step 6: Final answer
    x = 65,865.85

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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.