Home / 80,910.28-121,381.62-30,988.36

Finding the Fourth Proportional to 80,910.28, 121,381.62 and 30,988.36

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Solution

The fourth proportional to 80,910.28, 121,381.62 and 30,988.36 is: 46,488.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,910.28 : 121,381.62 = 30,988.36 : x
  2. Step 2: Convert to fraction form
    80,910.28/121,381.62 = 30,988.36/x
  3. Step 3: Cross multiply
    80,910.28x = 121,381.62 × 30,988.36
  4. Step 4: Simplify right side
    80,910.28x = 3,761,417,337.94
  5. Step 5: Solve for x
    x = 3,761,417,337.94/80,910.28
  6. Step 6: Final answer
    x = 46,488.74

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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.