Home / 87,775.28-121,129.81-49,542.87

Finding the Fourth Proportional to 87,775.28, 121,129.81 and 49,542.87

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Solution

The fourth proportional to 87,775.28, 121,129.81 and 49,542.87 is: 68,369.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,775.28 : 121,129.81 = 49,542.87 : x
  2. Step 2: Convert to fraction form
    87,775.28/121,129.81 = 49,542.87/x
  3. Step 3: Cross multiply
    87,775.28x = 121,129.81 × 49,542.87
  4. Step 4: Simplify right side
    87,775.28x = 6,001,118,429.95
  5. Step 5: Solve for x
    x = 6,001,118,429.95/87,775.28
  6. Step 6: Final answer
    x = 68,369.12

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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.