Home / 287,681.25-431,600.22-87,997.20

Finding the Fourth Proportional to 287,681.25, 431,600.22 and 87,997.20

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Solution

The fourth proportional to 287,681.25, 431,600.22 and 87,997.20 is: 132,019.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,681.25 : 431,600.22 = 87,997.20 : x
  2. Step 2: Convert to fraction form
    287,681.25/431,600.22 = 87,997.20/x
  3. Step 3: Cross multiply
    287,681.25x = 431,600.22 × 87,997.20
  4. Step 4: Simplify right side
    287,681.25x = 37,979,610,879.38
  5. Step 5: Solve for x
    x = 37,979,610,879.38/287,681.25
  6. Step 6: Final answer
    x = 132,019.76

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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.