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Finding the Fourth Proportional to 122,339.80, 168,835.62 and 68,641.84

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Solution

The fourth proportional to 122,339.80, 168,835.62 and 68,641.84 is: 94,729.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,339.80 : 168,835.62 = 68,641.84 : x
  2. Step 2: Convert to fraction form
    122,339.80/168,835.62 = 68,641.84/x
  3. Step 3: Cross multiply
    122,339.80x = 168,835.62 × 68,641.84
  4. Step 4: Simplify right side
    122,339.80x = 11,589,187,614.34
  5. Step 5: Solve for x
    x = 11,589,187,614.34/122,339.80
  6. Step 6: Final answer
    x = 94,729.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.