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Finding the Fourth Proportional to 131,791.80, 181,885.70 and 75,211.68

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Solution

The fourth proportional to 131,791.80, 181,885.70 and 75,211.68 is: 103,799.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,791.80 : 181,885.70 = 75,211.68 : x
  2. Step 2: Convert to fraction form
    131,791.80/181,885.70 = 75,211.68/x
  3. Step 3: Cross multiply
    131,791.80x = 181,885.70 × 75,211.68
  4. Step 4: Simplify right side
    131,791.80x = 13,679,929,064.98
  5. Step 5: Solve for x
    x = 13,679,929,064.98/131,791.80
  6. Step 6: Final answer
    x = 103,799.55

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1.5x scale

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.