Home / 140,781.42-194,278.39-77,121.48

Finding the Fourth Proportional to 140,781.42, 194,278.39 and 77,121.48

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Solution

The fourth proportional to 140,781.42, 194,278.39 and 77,121.48 is: 106,427.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,781.42 : 194,278.39 = 77,121.48 : x
  2. Step 2: Convert to fraction form
    140,781.42/194,278.39 = 77,121.48/x
  3. Step 3: Cross multiply
    140,781.42x = 194,278.39 × 77,121.48
  4. Step 4: Simplify right side
    140,781.42x = 14,983,035,997.43
  5. Step 5: Solve for x
    x = 14,983,035,997.43/140,781.42
  6. Step 6: Final answer
    x = 106,427.66

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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.