Home / 261,005.20-391,507.80-74,016.70

Finding the Fourth Proportional to 261,005.20, 391,507.80 and 74,016.70

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Solution

The fourth proportional to 261,005.20, 391,507.80 and 74,016.70 is: 111,025.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,005.20 : 391,507.80 = 74,016.70 : x
  2. Step 2: Convert to fraction form
    261,005.20/391,507.80 = 74,016.70/x
  3. Step 3: Cross multiply
    261,005.20x = 391,507.80 × 74,016.70
  4. Step 4: Simplify right side
    261,005.20x = 28,978,115,380.26
  5. Step 5: Solve for x
    x = 28,978,115,380.26/261,005.20
  6. Step 6: Final answer
    x = 111,025.05

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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.