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Finding the Fourth Proportional to 107,781.80, 161,672.70 and 73,956.20

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Solution

The fourth proportional to 107,781.80, 161,672.70 and 73,956.20 is: 110,934.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,781.80 : 161,672.70 = 73,956.20 : x
  2. Step 2: Convert to fraction form
    107,781.80/161,672.70 = 73,956.20/x
  3. Step 3: Cross multiply
    107,781.80x = 161,672.70 × 73,956.20
  4. Step 4: Simplify right side
    107,781.80x = 11,956,698,535.74
  5. Step 5: Solve for x
    x = 11,956,698,535.74/107,781.80
  6. Step 6: Final answer
    x = 110,934.30

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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.