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Finding the Fourth Proportional to 71,960.85, 107,931.56 and 19,373.49

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Solution

The fourth proportional to 71,960.85, 107,931.56 and 19,373.49 is: 29,057.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,960.85 : 107,931.56 = 19,373.49 : x
  2. Step 2: Convert to fraction form
    71,960.85/107,931.56 = 19,373.49/x
  3. Step 3: Cross multiply
    71,960.85x = 107,931.56 × 19,373.49
  4. Step 4: Simplify right side
    71,960.85x = 2,091,010,901.48
  5. Step 5: Solve for x
    x = 2,091,010,901.48/71,960.85
  6. Step 6: Final answer
    x = 29,057.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.