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Finding the Fourth Proportional to 71,347.74, 107,013.09 and 18,761.32

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Solution

The fourth proportional to 71,347.74, 107,013.09 and 18,761.32 is: 28,139.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,347.74 : 107,013.09 = 18,761.32 : x
  2. Step 2: Convert to fraction form
    71,347.74/107,013.09 = 18,761.32/x
  3. Step 3: Cross multiply
    71,347.74x = 107,013.09 × 18,761.32
  4. Step 4: Simplify right side
    71,347.74x = 2,007,707,029.80
  5. Step 5: Solve for x
    x = 2,007,707,029.80/71,347.74
  6. Step 6: Final answer
    x = 28,139.74

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1.5x scale

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.