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Finding the Fourth Proportional to 155,469.53, 214,545.44 and 87,486.47

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Solution

The fourth proportional to 155,469.53, 214,545.44 and 87,486.47 is: 120,729.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,469.53 : 214,545.44 = 87,486.47 : x
  2. Step 2: Convert to fraction form
    155,469.53/214,545.44 = 87,486.47/x
  3. Step 3: Cross multiply
    155,469.53x = 214,545.44 × 87,486.47
  4. Step 4: Simplify right side
    155,469.53x = 18,769,823,314.77
  5. Step 5: Solve for x
    x = 18,769,823,314.77/155,469.53
  6. Step 6: Final answer
    x = 120,729.91

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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.