Home / 107,838.20-161,757.30-85,287.80

Finding the Fourth Proportional to 107,838.20, 161,757.30 and 85,287.80

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Solution

The fourth proportional to 107,838.20, 161,757.30 and 85,287.80 is: 127,931.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,838.20 : 161,757.30 = 85,287.80 : x
  2. Step 2: Convert to fraction form
    107,838.20/161,757.30 = 85,287.80/x
  3. Step 3: Cross multiply
    107,838.20x = 161,757.30 × 85,287.80
  4. Step 4: Simplify right side
    107,838.20x = 13,795,924,250.94
  5. Step 5: Solve for x
    x = 13,795,924,250.94/107,838.20
  6. Step 6: Final answer
    x = 127,931.70

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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.