Home / 87,489.06-120,703.32-57,291.60

Finding the Fourth Proportional to 87,489.06, 120,703.32 and 57,291.60

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Solution

The fourth proportional to 87,489.06, 120,703.32 and 57,291.60 is: 79,041.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,489.06 : 120,703.32 = 57,291.60 : x
  2. Step 2: Convert to fraction form
    87,489.06/120,703.32 = 57,291.60/x
  3. Step 3: Cross multiply
    87,489.06x = 120,703.32 × 57,291.60
  4. Step 4: Simplify right side
    87,489.06x = 6,915,286,328.11
  5. Step 5: Solve for x
    x = 6,915,286,328.11/87,489.06
  6. Step 6: Final answer
    x = 79,041.73

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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.