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Finding the Fourth Proportional to 279,957.47, 419,687.53 and 109,139.81

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Solution

The fourth proportional to 279,957.47, 419,687.53 and 109,139.81 is: 163,612.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,957.47 : 419,687.53 = 109,139.81 : x
  2. Step 2: Convert to fraction form
    279,957.47/419,687.53 = 109,139.81/x
  3. Step 3: Cross multiply
    279,957.47x = 419,687.53 × 109,139.81
  4. Step 4: Simplify right side
    279,957.47x = 45,804,614,912.28
  5. Step 5: Solve for x
    x = 45,804,614,912.28/279,957.47
  6. Step 6: Final answer
    x = 163,612.76

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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.