Home / 81,966.40-122,949.60-74,708.80

Finding the Fourth Proportional to 81,966.40, 122,949.60 and 74,708.80

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Solution

The fourth proportional to 81,966.40, 122,949.60 and 74,708.80 is: 112,063.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,966.40 : 122,949.60 = 74,708.80 : x
  2. Step 2: Convert to fraction form
    81,966.40/122,949.60 = 74,708.80/x
  3. Step 3: Cross multiply
    81,966.40x = 122,949.60 × 74,708.80
  4. Step 4: Simplify right side
    81,966.40x = 9,185,417,076.48
  5. Step 5: Solve for x
    x = 9,185,417,076.48/81,966.40
  6. Step 6: Final answer
    x = 112,063.20

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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.