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Finding the Fourth Proportional to 205,657.60, 308,601.60 and 87,308.80

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Solution

The fourth proportional to 205,657.60, 308,601.60 and 87,308.80 is: 131,012.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,657.60 : 308,601.60 = 87,308.80 : x
  2. Step 2: Convert to fraction form
    205,657.60/308,601.60 = 87,308.80/x
  3. Step 3: Cross multiply
    205,657.60x = 308,601.60 × 87,308.80
  4. Step 4: Simplify right side
    205,657.60x = 26,943,635,374.08
  5. Step 5: Solve for x
    x = 26,943,635,374.08/205,657.60
  6. Step 6: Final answer
    x = 131,012.11

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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.