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Finding the Fourth Proportional to 287,751.52, 431,627.28 and 121,540.96

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Solution

The fourth proportional to 287,751.52, 431,627.28 and 121,540.96 is: 182,311.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,751.52 : 431,627.28 = 121,540.96 : x
  2. Step 2: Convert to fraction form
    287,751.52/431,627.28 = 121,540.96/x
  3. Step 3: Cross multiply
    287,751.52x = 431,627.28 × 121,540.96
  4. Step 4: Simplify right side
    287,751.52x = 52,460,393,973.39
  5. Step 5: Solve for x
    x = 52,460,393,973.39/287,751.52
  6. Step 6: Final answer
    x = 182,311.44

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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.