Home / 81,997.29-122,890.33-39,795.70

Finding the Fourth Proportional to 81,997.29, 122,890.33 and 39,795.70

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Solution

The fourth proportional to 81,997.29, 122,890.33 and 39,795.70 is: 59,642.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,997.29 : 122,890.33 = 39,795.70 : x
  2. Step 2: Convert to fraction form
    81,997.29/122,890.33 = 39,795.70/x
  3. Step 3: Cross multiply
    81,997.29x = 122,890.33 × 39,795.70
  4. Step 4: Simplify right side
    81,997.29x = 4,890,506,678.52
  5. Step 5: Solve for x
    x = 4,890,506,678.52/81,997.29
  6. Step 6: Final answer
    x = 59,642.30

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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.