Home / 87,778.13-121,133.61-47,491.76

Finding the Fourth Proportional to 87,778.13, 121,133.61 and 47,491.76

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Solution

The fourth proportional to 87,778.13, 121,133.61 and 47,491.76 is: 65,538.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,778.13 : 121,133.61 = 47,491.76 : x
  2. Step 2: Convert to fraction form
    87,778.13/121,133.61 = 47,491.76/x
  3. Step 3: Cross multiply
    87,778.13x = 121,133.61 × 47,491.76
  4. Step 4: Simplify right side
    87,778.13x = 5,752,847,728.39
  5. Step 5: Solve for x
    x = 5,752,847,728.39/87,778.13
  6. Step 6: Final answer
    x = 65,538.51

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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.