Home / 143,781.71-198,416.07-78,371.10

Finding the Fourth Proportional to 143,781.71, 198,416.07 and 78,371.10

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Solution

The fourth proportional to 143,781.71, 198,416.07 and 78,371.10 is: 108,150.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,781.71 : 198,416.07 = 78,371.10 : x
  2. Step 2: Convert to fraction form
    143,781.71/198,416.07 = 78,371.10/x
  3. Step 3: Cross multiply
    143,781.71x = 198,416.07 × 78,371.10
  4. Step 4: Simplify right side
    143,781.71x = 15,550,085,663.58
  5. Step 5: Solve for x
    x = 15,550,085,663.58/143,781.71
  6. Step 6: Final answer
    x = 108,150.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.