Home / 87,871.20-121,212.72-55,595.82

Finding the Fourth Proportional to 87,871.20, 121,212.72 and 55,595.82

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Solution

The fourth proportional to 87,871.20, 121,212.72 and 55,595.82 is: 76,690.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,871.20 : 121,212.72 = 55,595.82 : x
  2. Step 2: Convert to fraction form
    87,871.20/121,212.72 = 55,595.82/x
  3. Step 3: Cross multiply
    87,871.20x = 121,212.72 × 55,595.82
  4. Step 4: Simplify right side
    87,871.20x = 6,738,920,562.83
  5. Step 5: Solve for x
    x = 6,738,920,562.83/87,871.20
  6. Step 6: Final answer
    x = 76,690.89

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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.