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Finding the Fourth Proportional to 136,781.40, 188,843.63 and 88,408.61

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Solution

The fourth proportional to 136,781.40, 188,843.63 and 88,408.61 is: 122,059.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,781.40 : 188,843.63 = 88,408.61 : x
  2. Step 2: Convert to fraction form
    136,781.40/188,843.63 = 88,408.61/x
  3. Step 3: Cross multiply
    136,781.40x = 188,843.63 × 88,408.61
  4. Step 4: Simplify right side
    136,781.40x = 16,695,402,835.65
  5. Step 5: Solve for x
    x = 16,695,402,835.65/136,781.40
  6. Step 6: Final answer
    x = 122,059.01

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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.