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Finding the Fourth Proportional to 107,999.80, 161,999.70 and 72,748.60

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Solution

The fourth proportional to 107,999.80, 161,999.70 and 72,748.60 is: 109,122.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,999.80 : 161,999.70 = 72,748.60 : x
  2. Step 2: Convert to fraction form
    107,999.80/161,999.70 = 72,748.60/x
  3. Step 3: Cross multiply
    107,999.80x = 161,999.70 × 72,748.60
  4. Step 4: Simplify right side
    107,999.80x = 11,785,251,375.42
  5. Step 5: Solve for x
    x = 11,785,251,375.42/107,999.80
  6. Step 6: Final answer
    x = 109,122.90

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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.