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Finding the Fourth Proportional to 71,740.73, 107,512.66 and 45,398.32

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Solution

The fourth proportional to 71,740.73, 107,512.66 and 45,398.32 is: 68,035.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,740.73 : 107,512.66 = 45,398.32 : x
  2. Step 2: Convert to fraction form
    71,740.73/107,512.66 = 45,398.32/x
  3. Step 3: Cross multiply
    71,740.73x = 107,512.66 × 45,398.32
  4. Step 4: Simplify right side
    71,740.73x = 4,880,893,760.45
  5. Step 5: Solve for x
    x = 4,880,893,760.45/71,740.73
  6. Step 6: Final answer
    x = 68,035.18

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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.