Home / 107,931.12-161,979.90-70,481.04

Finding the Fourth Proportional to 107,931.12, 161,979.90 and 70,481.04

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Solution

The fourth proportional to 107,931.12, 161,979.90 and 70,481.04 is: 105,775.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,931.12 : 161,979.90 = 70,481.04 : x
  2. Step 2: Convert to fraction form
    107,931.12/161,979.90 = 70,481.04/x
  3. Step 3: Cross multiply
    107,931.12x = 161,979.90 × 70,481.04
  4. Step 4: Simplify right side
    107,931.12x = 11,416,511,811.10
  5. Step 5: Solve for x
    x = 11,416,511,811.10/107,931.12
  6. Step 6: Final answer
    x = 105,775.90

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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.