Home / 80,968.40-121,366.20-31,029.20

Finding the Fourth Proportional to 80,968.40, 121,366.20 and 31,029.20

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Solution

The fourth proportional to 80,968.40, 121,366.20 and 31,029.20 is: 46,510.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,968.40 : 121,366.20 = 31,029.20 : x
  2. Step 2: Convert to fraction form
    80,968.40/121,366.20 = 31,029.20/x
  3. Step 3: Cross multiply
    80,968.40x = 121,366.20 × 31,029.20
  4. Step 4: Simplify right side
    80,968.40x = 3,765,896,093.04
  5. Step 5: Solve for x
    x = 3,765,896,093.04/80,968.40
  6. Step 6: Final answer
    x = 46,510.69

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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.