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Finding the Fourth Proportional to 101,279.60, 151,919.40 and 31,149.80

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Solution

The fourth proportional to 101,279.60, 151,919.40 and 31,149.80 is: 46,724.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,279.60 : 151,919.40 = 31,149.80 : x
  2. Step 2: Convert to fraction form
    101,279.60/151,919.40 = 31,149.80/x
  3. Step 3: Cross multiply
    101,279.60x = 151,919.40 × 31,149.80
  4. Step 4: Simplify right side
    101,279.60x = 4,732,258,926.12
  5. Step 5: Solve for x
    x = 4,732,258,926.12/101,279.60
  6. Step 6: Final answer
    x = 46,724.70

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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.