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Finding the Fourth Proportional to 191,989.20, 287,854.20 and 102,046.80

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Solution

The fourth proportional to 191,989.20, 287,854.20 and 102,046.80 is: 153,001.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,989.20 : 287,854.20 = 102,046.80 : x
  2. Step 2: Convert to fraction form
    191,989.20/287,854.20 = 102,046.80/x
  3. Step 3: Cross multiply
    191,989.20x = 287,854.20 × 102,046.80
  4. Step 4: Simplify right side
    191,989.20x = 29,374,599,976.56
  5. Step 5: Solve for x
    x = 29,374,599,976.56/191,989.20
  6. Step 6: Final answer
    x = 153,001.31

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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.