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Finding the Fourth Proportional to 71,781.80, 107,675.90 and 27,429.80

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Solution

The fourth proportional to 71,781.80, 107,675.90 and 27,429.80 is: 41,145.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,781.80 : 107,675.90 = 27,429.80 : x
  2. Step 2: Convert to fraction form
    71,781.80/107,675.90 = 27,429.80/x
  3. Step 3: Cross multiply
    71,781.80x = 107,675.90 × 27,429.80
  4. Step 4: Simplify right side
    71,781.80x = 2,953,528,401.82
  5. Step 5: Solve for x
    x = 2,953,528,401.82/71,781.80
  6. Step 6: Final answer
    x = 41,145.92

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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.