Home / 87,711.10-121,013.69-53,684.12

Finding the Fourth Proportional to 87,711.10, 121,013.69 and 53,684.12

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Solution

The fourth proportional to 87,711.10, 121,013.69 and 53,684.12 is: 74,067.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,711.10 : 121,013.69 = 53,684.12 : x
  2. Step 2: Convert to fraction form
    87,711.10/121,013.69 = 53,684.12/x
  3. Step 3: Cross multiply
    87,711.10x = 121,013.69 × 53,684.12
  4. Step 4: Simplify right side
    87,711.10x = 6,496,513,455.60
  5. Step 5: Solve for x
    x = 6,496,513,455.60/87,711.10
  6. Step 6: Final answer
    x = 74,067.18

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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.