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Finding the Fourth Proportional to 325,129.65, 487,645.21 and 88,490.78

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Solution

The fourth proportional to 325,129.65, 487,645.21 and 88,490.78 is: 132,722.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,129.65 : 487,645.21 = 88,490.78 : x
  2. Step 2: Convert to fraction form
    325,129.65/487,645.21 = 88,490.78/x
  3. Step 3: Cross multiply
    325,129.65x = 487,645.21 × 88,490.78
  4. Step 4: Simplify right side
    325,129.65x = 43,152,104,497.22
  5. Step 5: Solve for x
    x = 43,152,104,497.22/325,129.65
  6. Step 6: Final answer
    x = 132,722.76

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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.