Home / 287,601.54-431,403.42-87,921.18

Finding the Fourth Proportional to 287,601.54, 431,403.42 and 87,921.18

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Solution

The fourth proportional to 287,601.54, 431,403.42 and 87,921.18 is: 131,882.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,601.54 : 431,403.42 = 87,921.18 : x
  2. Step 2: Convert to fraction form
    287,601.54/431,403.42 = 87,921.18/x
  3. Step 3: Cross multiply
    287,601.54x = 431,403.42 × 87,921.18
  4. Step 4: Simplify right side
    287,601.54x = 37,929,497,742.44
  5. Step 5: Solve for x
    x = 37,929,497,742.44/287,601.54
  6. Step 6: Final answer
    x = 131,882.11

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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.