Home / 287,781.12-431,302.19-137,796.66

Finding the Fourth Proportional to 287,781.12, 431,302.19 and 137,796.66

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Solution

The fourth proportional to 287,781.12, 431,302.19 and 137,796.66 is: 206,518.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,781.12 : 431,302.19 = 137,796.66 : x
  2. Step 2: Convert to fraction form
    287,781.12/431,302.19 = 137,796.66/x
  3. Step 3: Cross multiply
    287,781.12x = 431,302.19 × 137,796.66
  4. Step 4: Simplify right side
    287,781.12x = 59,432,000,543.70
  5. Step 5: Solve for x
    x = 59,432,000,543.70/287,781.12
  6. Step 6: Final answer
    x = 206,518.07

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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.