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Finding the Fourth Proportional to 287,705.90, 431,543.26 and 88,026.32

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Solution

The fourth proportional to 287,705.90, 431,543.26 and 88,026.32 is: 132,034.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,705.90 : 431,543.26 = 88,026.32 : x
  2. Step 2: Convert to fraction form
    287,705.90/431,543.26 = 88,026.32/x
  3. Step 3: Cross multiply
    287,705.90x = 431,543.26 × 88,026.32
  4. Step 4: Simplify right side
    287,705.90x = 37,987,165,098.60
  5. Step 5: Solve for x
    x = 37,987,165,098.60/287,705.90
  6. Step 6: Final answer
    x = 132,034.71

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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.