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Finding the Fourth Proportional to 70,906.76, 97,851.72 and 40,689.68

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Solution

The fourth proportional to 70,906.76, 97,851.72 and 40,689.68 is: 56,151.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,906.76 : 97,851.72 = 40,689.68 : x
  2. Step 2: Convert to fraction form
    70,906.76/97,851.72 = 40,689.68/x
  3. Step 3: Cross multiply
    70,906.76x = 97,851.72 × 40,689.68
  4. Step 4: Simplify right side
    70,906.76x = 3,981,555,174.25
  5. Step 5: Solve for x
    x = 3,981,555,174.25/70,906.76
  6. Step 6: Final answer
    x = 56,151.98

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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.