Home / 80,985.40-121,391.70-31,046.20

Finding the Fourth Proportional to 80,985.40, 121,391.70 and 31,046.20

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Solution

The fourth proportional to 80,985.40, 121,391.70 and 31,046.20 is: 46,536.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,985.40 : 121,391.70 = 31,046.20 : x
  2. Step 2: Convert to fraction form
    80,985.40/121,391.70 = 31,046.20/x
  3. Step 3: Cross multiply
    80,985.40x = 121,391.70 × 31,046.20
  4. Step 4: Simplify right side
    80,985.40x = 3,768,750,996.54
  5. Step 5: Solve for x
    x = 3,768,750,996.54/80,985.40
  6. Step 6: Final answer
    x = 46,536.18

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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.