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Finding the Fourth Proportional to 73,503.72, 100,824.84 and 72,871.20

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Solution

The fourth proportional to 73,503.72, 100,824.84 and 72,871.20 is: 99,957.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,503.72 : 100,824.84 = 72,871.20 : x
  2. Step 2: Convert to fraction form
    73,503.72/100,824.84 = 72,871.20/x
  3. Step 3: Cross multiply
    73,503.72x = 100,824.84 × 72,871.20
  4. Step 4: Simplify right side
    73,503.72x = 7,347,227,080.61
  5. Step 5: Solve for x
    x = 7,347,227,080.61/73,503.72
  6. Step 6: Final answer
    x = 99,957.21

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.