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Finding the Fourth Proportional to 72,304, 99,778.48 and 40,472.88

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Solution

The fourth proportional to 72,304, 99,778.48 and 40,472.88 is: 55,851.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,304 : 99,778.48 = 40,472.88 : x
  2. Step 2: Convert to fraction form
    72,304/99,778.48 = 40,472.88/x
  3. Step 3: Cross multiply
    72,304x = 99,778.48 × 40,472.88
  4. Step 4: Simplify right side
    72,304x = 4,038,322,447.62
  5. Step 5: Solve for x
    x = 4,038,322,447.62/72,304
  6. Step 6: Final answer
    x = 55,851.99

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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.