Home / 87,813.20-131,719.80-56,320.40

Finding the Fourth Proportional to 87,813.20, 131,719.80 and 56,320.40

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Solution

The fourth proportional to 87,813.20, 131,719.80 and 56,320.40 is: 84,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,813.20 : 131,719.80 = 56,320.40 : x
  2. Step 2: Convert to fraction form
    87,813.20/131,719.80 = 56,320.40/x
  3. Step 3: Cross multiply
    87,813.20x = 131,719.80 × 56,320.40
  4. Step 4: Simplify right side
    87,813.20x = 7,418,511,823.92
  5. Step 5: Solve for x
    x = 7,418,511,823.92/87,813.20
  6. Step 6: Final answer
    x = 84,480.60

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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.