Home / 87,878.87-121,272.21-47,591.70

Finding the Fourth Proportional to 87,878.87, 121,272.21 and 47,591.70

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Solution

The fourth proportional to 87,878.87, 121,272.21 and 47,591.70 is: 65,676.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,878.87 : 121,272.21 = 47,591.70 : x
  2. Step 2: Convert to fraction form
    87,878.87/121,272.21 = 47,591.70/x
  3. Step 3: Cross multiply
    87,878.87x = 121,272.21 × 47,591.70
  4. Step 4: Simplify right side
    87,878.87x = 5,771,550,997.89
  5. Step 5: Solve for x
    x = 5,771,550,997.89/87,878.87
  6. Step 6: Final answer
    x = 65,676.21

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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.