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Finding the Fourth Proportional to 84,008.34, 125,721.84 and 68,840.10

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Solution

The fourth proportional to 84,008.34, 125,721.84 and 68,840.10 is: 103,021.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,008.34 : 125,721.84 = 68,840.10 : x
  2. Step 2: Convert to fraction form
    84,008.34/125,721.84 = 68,840.10/x
  3. Step 3: Cross multiply
    84,008.34x = 125,721.84 × 68,840.10
  4. Step 4: Simplify right side
    84,008.34x = 8,654,704,037.78
  5. Step 5: Solve for x
    x = 8,654,704,037.78/84,008.34
  6. Step 6: Final answer
    x = 103,021.96

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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.