Home / 87,920.11-121,329.78-47,634.15

Finding the Fourth Proportional to 87,920.11, 121,329.78 and 47,634.15

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Solution

The fourth proportional to 87,920.11, 121,329.78 and 47,634.15 is: 65,735.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,920.11 : 121,329.78 = 47,634.15 : x
  2. Step 2: Convert to fraction form
    87,920.11/121,329.78 = 47,634.15/x
  3. Step 3: Cross multiply
    87,920.11x = 121,329.78 × 47,634.15
  4. Step 4: Simplify right side
    87,920.11x = 5,779,440,939.99
  5. Step 5: Solve for x
    x = 5,779,440,939.99/87,920.11
  6. Step 6: Final answer
    x = 65,735.14

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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.