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Finding the Fourth Proportional to 71,889.76, 99,203.84 and 39,623.32

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Solution

The fourth proportional to 71,889.76, 99,203.84 and 39,623.32 is: 54,677.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,889.76 : 99,203.84 = 39,623.32 : x
  2. Step 2: Convert to fraction form
    71,889.76/99,203.84 = 39,623.32/x
  3. Step 3: Cross multiply
    71,889.76x = 99,203.84 × 39,623.32
  4. Step 4: Simplify right side
    71,889.76x = 3,930,785,497.55
  5. Step 5: Solve for x
    x = 3,930,785,497.55/71,889.76
  6. Step 6: Final answer
    x = 54,677.96

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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.