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Finding the Fourth Proportional to 71,357.62, 107,043.49 and 26,390.78

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Solution

The fourth proportional to 71,357.62, 107,043.49 and 26,390.78 is: 39,588.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,357.62 : 107,043.49 = 26,390.78 : x
  2. Step 2: Convert to fraction form
    71,357.62/107,043.49 = 26,390.78/x
  3. Step 3: Cross multiply
    71,357.62x = 107,043.49 × 26,390.78
  4. Step 4: Simplify right side
    71,357.62x = 2,824,961,195.02
  5. Step 5: Solve for x
    x = 2,824,961,195.02/71,357.62
  6. Step 6: Final answer
    x = 39,588.78

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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.