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Finding the Fourth Proportional to 99,403.72, 149,049.10 and 67,851.97

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Solution

The fourth proportional to 99,403.72, 149,049.10 and 67,851.97 is: 101,739.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,403.72 : 149,049.10 = 67,851.97 : x
  2. Step 2: Convert to fraction form
    99,403.72/149,049.10 = 67,851.97/x
  3. Step 3: Cross multiply
    99,403.72x = 149,049.10 × 67,851.97
  4. Step 4: Simplify right side
    99,403.72x = 10,113,274,722.47
  5. Step 5: Solve for x
    x = 10,113,274,722.47/99,403.72
  6. Step 6: Final answer
    x = 101,739.40

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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.