Home / 122,739.92-169,145.16-87,350.48

Finding the Fourth Proportional to 122,739.92, 169,145.16 and 87,350.48

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Solution

The fourth proportional to 122,739.92, 169,145.16 and 87,350.48 is: 120,375.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,739.92 : 169,145.16 = 87,350.48 : x
  2. Step 2: Convert to fraction form
    122,739.92/169,145.16 = 87,350.48/x
  3. Step 3: Cross multiply
    122,739.92x = 169,145.16 × 87,350.48
  4. Step 4: Simplify right side
    122,739.92x = 14,774,910,915.68
  5. Step 5: Solve for x
    x = 14,774,910,915.68/122,739.92
  6. Step 6: Final answer
    x = 120,375.76

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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.