Home / 81,848.20-122,772.30-68,715.40

Finding the Fourth Proportional to 81,848.20, 122,772.30 and 68,715.40

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Solution

The fourth proportional to 81,848.20, 122,772.30 and 68,715.40 is: 103,073.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,848.20 : 122,772.30 = 68,715.40 : x
  2. Step 2: Convert to fraction form
    81,848.20/122,772.30 = 68,715.40/x
  3. Step 3: Cross multiply
    81,848.20x = 122,772.30 × 68,715.40
  4. Step 4: Simplify right side
    81,848.20x = 8,436,347,703.42
  5. Step 5: Solve for x
    x = 8,436,347,703.42/81,848.20
  6. Step 6: Final answer
    x = 103,073.10

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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.