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Finding the Fourth Proportional to 205,854.60, 308,781.90 and 87,529.80

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Solution

The fourth proportional to 205,854.60, 308,781.90 and 87,529.80 is: 131,294.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,854.60 : 308,781.90 = 87,529.80 : x
  2. Step 2: Convert to fraction form
    205,854.60/308,781.90 = 87,529.80/x
  3. Step 3: Cross multiply
    205,854.60x = 308,781.90 × 87,529.80
  4. Step 4: Simplify right side
    205,854.60x = 27,027,617,950.62
  5. Step 5: Solve for x
    x = 27,027,617,950.62/205,854.60
  6. Step 6: Final answer
    x = 131,294.70

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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.