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Finding the Fourth Proportional to 191,969.80, 287,565.90 and 108,766.60

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Solution

The fourth proportional to 191,969.80, 287,565.90 and 108,766.60 is: 162,929.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,969.80 : 287,565.90 = 108,766.60 : x
  2. Step 2: Convert to fraction form
    191,969.80/287,565.90 = 108,766.60/x
  3. Step 3: Cross multiply
    191,969.80x = 287,565.90 × 108,766.60
  4. Step 4: Simplify right side
    191,969.80x = 31,277,565,218.94
  5. Step 5: Solve for x
    x = 31,277,565,218.94/191,969.80
  6. Step 6: Final answer
    x = 162,929.61

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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.