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Finding the Fourth Proportional to 218,274.86, 301,216.20 and 122,781.53

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Solution

The fourth proportional to 218,274.86, 301,216.20 and 122,781.53 is: 169,436.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,274.86 : 301,216.20 = 122,781.53 : x
  2. Step 2: Convert to fraction form
    218,274.86/301,216.20 = 122,781.53/x
  3. Step 3: Cross multiply
    218,274.86x = 301,216.20 × 122,781.53
  4. Step 4: Simplify right side
    218,274.86x = 36,983,784,390.71
  5. Step 5: Solve for x
    x = 36,983,784,390.71/218,274.86
  6. Step 6: Final answer
    x = 169,436.76

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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.