Home / 87,719.54-121,043.87-64,761.57

Finding the Fourth Proportional to 87,719.54, 121,043.87 and 64,761.57

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Solution

The fourth proportional to 87,719.54, 121,043.87 and 64,761.57 is: 89,364.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,719.54 : 121,043.87 = 64,761.57 : x
  2. Step 2: Convert to fraction form
    87,719.54/121,043.87 = 64,761.57/x
  3. Step 3: Cross multiply
    87,719.54x = 121,043.87 × 64,761.57
  4. Step 4: Simplify right side
    87,719.54x = 7,838,991,221.98
  5. Step 5: Solve for x
    x = 7,838,991,221.98/87,719.54
  6. Step 6: Final answer
    x = 89,364.26

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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.