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Finding the Fourth Proportional to 70,979.68, 97,952.48 and 39,147.76

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Solution

The fourth proportional to 70,979.68, 97,952.48 and 39,147.76 is: 54,024.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,979.68 : 97,952.48 = 39,147.76 : x
  2. Step 2: Convert to fraction form
    70,979.68/97,952.48 = 39,147.76/x
  3. Step 3: Cross multiply
    70,979.68x = 97,952.48 × 39,147.76
  4. Step 4: Simplify right side
    70,979.68x = 3,834,620,178.44
  5. Step 5: Solve for x
    x = 3,834,620,178.44/70,979.68
  6. Step 6: Final answer
    x = 54,024.20

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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.