Home / 81,431,306.40-122,146,959.60-68,676,722.40

Finding the Fourth Proportional to 81,431,306.40, 122,146,959.60 and 68,676,722.40

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Solution

The fourth proportional to 81,431,306.40, 122,146,959.60 and 68,676,722.40 is: 103,015,083.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,431,306.40 : 122,146,959.60 = 68,676,722.40 : x
  2. Step 2: Convert to fraction form
    81,431,306.40/122,146,959.60 = 68,676,722.40/x
  3. Step 3: Cross multiply
    81,431,306.40x = 122,146,959.60 × 68,676,722.40
  4. Step 4: Simplify right side
    81,431,306.40x = 8,388,652,836,453,215
  5. Step 5: Solve for x
    x = 8,388,652,836,453,215/81,431,306.40
  6. Step 6: Final answer
    x = 103,015,083.60

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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.