Home / 87,815.15-121,171.91-51,502.85

Finding the Fourth Proportional to 87,815.15, 121,171.91 and 51,502.85

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Solution

The fourth proportional to 87,815.15, 121,171.91 and 51,502.85 is: 71,066.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,815.15 : 121,171.91 = 51,502.85 : x
  2. Step 2: Convert to fraction form
    87,815.15/121,171.91 = 51,502.85/x
  3. Step 3: Cross multiply
    87,815.15x = 121,171.91 × 51,502.85
  4. Step 4: Simplify right side
    87,815.15x = 6,240,698,704.94
  5. Step 5: Solve for x
    x = 6,240,698,704.94/87,815.15
  6. Step 6: Final answer
    x = 71,066.31

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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.