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Finding the Fourth Proportional to 218,697.70, 301,766.28 and 121,880.41

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Solution

The fourth proportional to 218,697.70, 301,766.28 and 121,880.41 is: 168,174.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,697.70 : 301,766.28 = 121,880.41 : x
  2. Step 2: Convert to fraction form
    218,697.70/301,766.28 = 121,880.41/x
  3. Step 3: Cross multiply
    218,697.70x = 301,766.28 × 121,880.41
  4. Step 4: Simplify right side
    218,697.70x = 36,779,397,930.57
  5. Step 5: Solve for x
    x = 36,779,397,930.57/218,697.70
  6. Step 6: Final answer
    x = 168,174.60

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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.