Home / 287,821.45-431,733.19-88,140.96

Finding the Fourth Proportional to 287,821.45, 431,733.19 and 88,140.96

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Solution

The fourth proportional to 287,821.45, 431,733.19 and 88,140.96 is: 132,211.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,821.45 : 431,733.19 = 88,140.96 : x
  2. Step 2: Convert to fraction form
    287,821.45/431,733.19 = 88,140.96/x
  3. Step 3: Cross multiply
    287,821.45x = 431,733.19 × 88,140.96
  4. Step 4: Simplify right side
    287,821.45x = 38,053,377,775.37
  5. Step 5: Solve for x
    x = 38,053,377,775.37/287,821.45
  6. Step 6: Final answer
    x = 132,211.75

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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.