Home / 87,511.74-120,765.15-49,785.90

Finding the Fourth Proportional to 87,511.74, 120,765.15 and 49,785.90

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Solution

The fourth proportional to 87,511.74, 120,765.15 and 49,785.90 is: 68,703.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,511.74 : 120,765.15 = 49,785.90 : x
  2. Step 2: Convert to fraction form
    87,511.74/120,765.15 = 49,785.90/x
  3. Step 3: Cross multiply
    87,511.74x = 120,765.15 × 49,785.90
  4. Step 4: Simplify right side
    87,511.74x = 6,012,401,681.39
  5. Step 5: Solve for x
    x = 6,012,401,681.39/87,511.74
  6. Step 6: Final answer
    x = 68,703.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.