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Finding the Fourth Proportional to 119,380.32, 179,034.84 and 85,999.68

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Solution

The fourth proportional to 119,380.32, 179,034.84 and 85,999.68 is: 128,973.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,380.32 : 179,034.84 = 85,999.68 : x
  2. Step 2: Convert to fraction form
    119,380.32/179,034.84 = 85,999.68/x
  3. Step 3: Cross multiply
    119,380.32x = 179,034.84 × 85,999.68
  4. Step 4: Simplify right side
    119,380.32x = 15,396,938,948.85
  5. Step 5: Solve for x
    x = 15,396,938,948.85/119,380.32
  6. Step 6: Final answer
    x = 128,973.85

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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.