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Finding the Fourth Proportional to 99,740.72, 149,520.92 and 67,730.47

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Solution

The fourth proportional to 99,740.72, 149,520.92 and 67,730.47 is: 101,534.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,740.72 : 149,520.92 = 67,730.47 : x
  2. Step 2: Convert to fraction form
    99,740.72/149,520.92 = 67,730.47/x
  3. Step 3: Cross multiply
    99,740.72x = 149,520.92 × 67,730.47
  4. Step 4: Simplify right side
    99,740.72x = 10,127,122,186.43
  5. Step 5: Solve for x
    x = 10,127,122,186.43/99,740.72
  6. Step 6: Final answer
    x = 101,534.48

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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.