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Finding the Fourth Proportional to 82,920.30, 124,234.65 and 68,048.70

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Solution

The fourth proportional to 82,920.30, 124,234.65 and 68,048.70 is: 101,953.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,920.30 : 124,234.65 = 68,048.70 : x
  2. Step 2: Convert to fraction form
    82,920.30/124,234.65 = 68,048.70/x
  3. Step 3: Cross multiply
    82,920.30x = 124,234.65 × 68,048.70
  4. Step 4: Simplify right side
    82,920.30x = 8,454,006,427.46
  5. Step 5: Solve for x
    x = 8,454,006,427.46/82,920.30
  6. Step 6: Final answer
    x = 101,953.40

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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.