Home / 80,859.09-121,128.20-38,105.98

Finding the Fourth Proportional to 80,859.09, 121,128.20 and 38,105.98

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Solution

The fourth proportional to 80,859.09, 121,128.20 and 38,105.98 is: 57,083.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,859.09 : 121,128.20 = 38,105.98 : x
  2. Step 2: Convert to fraction form
    80,859.09/121,128.20 = 38,105.98/x
  3. Step 3: Cross multiply
    80,859.09x = 121,128.20 × 38,105.98
  4. Step 4: Simplify right side
    80,859.09x = 4,615,708,416.18
  5. Step 5: Solve for x
    x = 4,615,708,416.18/80,859.09
  6. Step 6: Final answer
    x = 57,083.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.