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Finding the Fourth Proportional to 218,566.66, 301,613.88 and 121,768.24

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Solution

The fourth proportional to 218,566.66, 301,613.88 and 121,768.24 is: 168,035.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,566.66 : 301,613.88 = 121,768.24 : x
  2. Step 2: Convert to fraction form
    218,566.66/301,613.88 = 121,768.24/x
  3. Step 3: Cross multiply
    218,566.66x = 301,613.88 × 121,768.24
  4. Step 4: Simplify right side
    218,566.66x = 36,726,991,327.17
  5. Step 5: Solve for x
    x = 36,726,991,327.17/218,566.66
  6. Step 6: Final answer
    x = 168,035.65

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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.