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Finding the Fourth Proportional to 218,667.71, 301,770.63 and 121,871.61

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Solution

The fourth proportional to 218,667.71, 301,770.63 and 121,871.61 is: 168,187.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,667.71 : 301,770.63 = 121,871.61 : x
  2. Step 2: Convert to fraction form
    218,667.71/301,770.63 = 121,871.61/x
  3. Step 3: Cross multiply
    218,667.71x = 301,770.63 × 121,871.61
  4. Step 4: Simplify right side
    218,667.71x = 36,777,272,528.81
  5. Step 5: Solve for x
    x = 36,777,272,528.81/218,667.71
  6. Step 6: Final answer
    x = 168,187.94

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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.