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Finding the Fourth Proportional to 121,278.60, 181,950.30 and 108,221.40

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Solution

The fourth proportional to 121,278.60, 181,950.30 and 108,221.40 is: 162,361.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,278.60 : 181,950.30 = 108,221.40 : x
  2. Step 2: Convert to fraction form
    121,278.60/181,950.30 = 108,221.40/x
  3. Step 3: Cross multiply
    121,278.60x = 181,950.30 × 108,221.40
  4. Step 4: Simplify right side
    121,278.60x = 19,690,916,196.42
  5. Step 5: Solve for x
    x = 19,690,916,196.42/121,278.60
  6. Step 6: Final answer
    x = 162,361.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.