Home / 129,518.12-194,062.40-78,763.61

Finding the Fourth Proportional to 129,518.12, 194,062.40 and 78,763.61

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Solution

The fourth proportional to 129,518.12, 194,062.40 and 78,763.61 is: 118,014.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,518.12 : 194,062.40 = 78,763.61 : x
  2. Step 2: Convert to fraction form
    129,518.12/194,062.40 = 78,763.61/x
  3. Step 3: Cross multiply
    129,518.12x = 194,062.40 × 78,763.61
  4. Step 4: Simplify right side
    129,518.12x = 15,285,055,575.97
  5. Step 5: Solve for x
    x = 15,285,055,575.97/129,518.12
  6. Step 6: Final answer
    x = 118,014.80

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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.