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Finding the Fourth Proportional to 287,689.96, 431,519.33 and 88,010.37

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Solution

The fourth proportional to 287,689.96, 431,519.33 and 88,010.37 is: 132,010.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,689.96 : 431,519.33 = 88,010.37 : x
  2. Step 2: Convert to fraction form
    287,689.96/431,519.33 = 88,010.37/x
  3. Step 3: Cross multiply
    287,689.96x = 431,519.33 × 88,010.37
  4. Step 4: Simplify right side
    287,689.96x = 37,978,176,115.48
  5. Step 5: Solve for x
    x = 37,978,176,115.48/287,689.96
  6. Step 6: Final answer
    x = 132,010.78

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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.