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Finding the Fourth Proportional to 70,422.11, 97,125.92 and 61,906.11

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Solution

The fourth proportional to 70,422.11, 97,125.92 and 61,906.11 is: 85,380.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,422.11 : 97,125.92 = 61,906.11 : x
  2. Step 2: Convert to fraction form
    70,422.11/97,125.92 = 61,906.11/x
  3. Step 3: Cross multiply
    70,422.11x = 97,125.92 × 61,906.11
  4. Step 4: Simplify right side
    70,422.11x = 6,012,687,445.77
  5. Step 5: Solve for x
    x = 6,012,687,445.77/70,422.11
  6. Step 6: Final answer
    x = 85,380.68

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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.