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Finding the Fourth Proportional to 287,712.75, 431,551.05 and 88,017.27

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Solution

The fourth proportional to 287,712.75, 431,551.05 and 88,017.27 is: 132,020.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712.75 : 431,551.05 = 88,017.27 : x
  2. Step 2: Convert to fraction form
    287,712.75/431,551.05 = 88,017.27/x
  3. Step 3: Cross multiply
    287,712.75x = 431,551.05 × 88,017.27
  4. Step 4: Simplify right side
    287,712.75x = 37,983,945,286.63
  5. Step 5: Solve for x
    x = 37,983,945,286.63/287,712.75
  6. Step 6: Final answer
    x = 132,020.38

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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.