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Finding the Fourth Proportional to 287,763.90, 431,608.05 and 88,104.30

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Solution

The fourth proportional to 287,763.90, 431,608.05 and 88,104.30 is: 132,144.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,763.90 : 431,608.05 = 88,104.30 : x
  2. Step 2: Convert to fraction form
    287,763.90/431,608.05 = 88,104.30/x
  3. Step 3: Cross multiply
    287,763.90x = 431,608.05 × 88,104.30
  4. Step 4: Simplify right side
    287,763.90x = 38,026,525,119.62
  5. Step 5: Solve for x
    x = 38,026,525,119.62/287,763.90
  6. Step 6: Final answer
    x = 132,144.88

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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.