Home / 120,974.40-181,515.60-42,145.20

Finding the Fourth Proportional to 120,974.40, 181,515.60 and 42,145.20

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Solution

The fourth proportional to 120,974.40, 181,515.60 and 42,145.20 is: 63,236.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,974.40 : 181,515.60 = 42,145.20 : x
  2. Step 2: Convert to fraction form
    120,974.40/181,515.60 = 42,145.20/x
  3. Step 3: Cross multiply
    120,974.40x = 181,515.60 × 42,145.20
  4. Step 4: Simplify right side
    120,974.40x = 7,650,011,265.12
  5. Step 5: Solve for x
    x = 7,650,011,265.12/120,974.40
  6. Step 6: Final answer
    x = 63,236.61

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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.