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Finding the Fourth Proportional to 218,641.29, 328,136.87 and 113,490.33

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Solution

The fourth proportional to 218,641.29, 328,136.87 and 113,490.33 is: 170,326.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,641.29 : 328,136.87 = 113,490.33 : x
  2. Step 2: Convert to fraction form
    218,641.29/328,136.87 = 113,490.33/x
  3. Step 3: Cross multiply
    218,641.29x = 328,136.87 × 113,490.33
  4. Step 4: Simplify right side
    218,641.29x = 37,240,361,661.47
  5. Step 5: Solve for x
    x = 37,240,361,661.47/218,641.29
  6. Step 6: Final answer
    x = 170,326.30

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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.