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Finding the Fourth Proportional to 129,942, 179,319.96 and 70,326

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Solution

The fourth proportional to 129,942, 179,319.96 and 70,326 is: 97,049.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,942 : 179,319.96 = 70,326 : x
  2. Step 2: Convert to fraction form
    129,942/179,319.96 = 70,326/x
  3. Step 3: Cross multiply
    129,942x = 179,319.96 × 70,326
  4. Step 4: Simplify right side
    129,942x = 12,610,855,506.96
  5. Step 5: Solve for x
    x = 12,610,855,506.96/129,942
  6. Step 6: Final answer
    x = 97,049.88

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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.