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Finding the Fourth Proportional to 75,878.80, 113,818.20 and 71,990.80

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Solution

The fourth proportional to 75,878.80, 113,818.20 and 71,990.80 is: 107,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,878.80 : 113,818.20 = 71,990.80 : x
  2. Step 2: Convert to fraction form
    75,878.80/113,818.20 = 71,990.80/x
  3. Step 3: Cross multiply
    75,878.80x = 113,818.20 × 71,990.80
  4. Step 4: Simplify right side
    75,878.80x = 8,193,863,272.56
  5. Step 5: Solve for x
    x = 8,193,863,272.56/75,878.80
  6. Step 6: Final answer
    x = 107,986.20

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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.