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Finding the Fourth Proportional to 218,696.70, 301,764.90 and 121,879.41

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Solution

The fourth proportional to 218,696.70, 301,764.90 and 121,879.41 is: 168,173.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,696.70 : 301,764.90 = 121,879.41 : x
  2. Step 2: Convert to fraction form
    218,696.70/301,764.90 = 121,879.41/x
  3. Step 3: Cross multiply
    218,696.70x = 301,764.90 × 121,879.41
  4. Step 4: Simplify right side
    218,696.70x = 36,778,927,970.71
  5. Step 5: Solve for x
    x = 36,778,927,970.71/218,696.70
  6. Step 6: Final answer
    x = 168,173.22

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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.