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Finding the Fourth Proportional to 70,242.31, 96,934.49 and 39,615.81

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Solution

The fourth proportional to 70,242.31, 96,934.49 and 39,615.81 is: 54,669.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,242.31 : 96,934.49 = 39,615.81 : x
  2. Step 2: Convert to fraction form
    70,242.31/96,934.49 = 39,615.81/x
  3. Step 3: Cross multiply
    70,242.31x = 96,934.49 × 39,615.81
  4. Step 4: Simplify right side
    70,242.31x = 3,840,138,338.29
  5. Step 5: Solve for x
    x = 3,840,138,338.29/70,242.31
  6. Step 6: Final answer
    x = 54,669.88

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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.