Home / 87,661.68-120,971.32-49,421.28

Finding the Fourth Proportional to 87,661.68, 120,971.32 and 49,421.28

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Solution

The fourth proportional to 87,661.68, 120,971.32 and 49,421.28 is: 68,200.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,661.68 : 120,971.32 = 49,421.28 : x
  2. Step 2: Convert to fraction form
    87,661.68/120,971.32 = 49,421.28/x
  3. Step 3: Cross multiply
    87,661.68x = 120,971.32 × 49,421.28
  4. Step 4: Simplify right side
    87,661.68x = 5,978,557,477.69
  5. Step 5: Solve for x
    x = 5,978,557,477.69/87,661.68
  6. Step 6: Final answer
    x = 68,200.35

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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.