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Finding the Fourth Proportional to 287,717.80, 431,609.10 and 88,036.60

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Solution

The fourth proportional to 287,717.80, 431,609.10 and 88,036.60 is: 132,064.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,717.80 : 431,609.10 = 88,036.60 : x
  2. Step 2: Convert to fraction form
    287,717.80/431,609.10 = 88,036.60/x
  3. Step 3: Cross multiply
    287,717.80x = 431,609.10 × 88,036.60
  4. Step 4: Simplify right side
    287,717.80x = 37,997,397,693.06
  5. Step 5: Solve for x
    x = 37,997,397,693.06/287,717.80
  6. Step 6: Final answer
    x = 132,064.81

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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.