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Finding the Fourth Proportional to 71,743.02, 99,002.76 and 39,911.28

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Solution

The fourth proportional to 71,743.02, 99,002.76 and 39,911.28 is: 55,076.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,743.02 : 99,002.76 = 39,911.28 : x
  2. Step 2: Convert to fraction form
    71,743.02/99,002.76 = 39,911.28/x
  3. Step 3: Cross multiply
    71,743.02x = 99,002.76 × 39,911.28
  4. Step 4: Simplify right side
    71,743.02x = 3,951,326,875.13
  5. Step 5: Solve for x
    x = 3,951,326,875.13/71,743.02
  6. Step 6: Final answer
    x = 55,076.12

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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.