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Finding the Fourth Proportional to 80,859.36, 121,201.95 and 38,649.69

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Solution

The fourth proportional to 80,859.36, 121,201.95 and 38,649.69 is: 57,932.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,859.36 : 121,201.95 = 38,649.69 : x
  2. Step 2: Convert to fraction form
    80,859.36/121,201.95 = 38,649.69/x
  3. Step 3: Cross multiply
    80,859.36x = 121,201.95 × 38,649.69
  4. Step 4: Simplify right side
    80,859.36x = 4,684,417,939.83
  5. Step 5: Solve for x
    x = 4,684,417,939.83/80,859.36
  6. Step 6: Final answer
    x = 57,932.91

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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.