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Finding the Fourth Proportional to 218,405.31, 301,349.47 and 122,877.15

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Solution

The fourth proportional to 218,405.31, 301,349.47 and 122,877.15 is: 169,542.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,405.31 : 301,349.47 = 122,877.15 : x
  2. Step 2: Convert to fraction form
    218,405.31/301,349.47 = 122,877.15/x
  3. Step 3: Cross multiply
    218,405.31x = 301,349.47 × 122,877.15
  4. Step 4: Simplify right side
    218,405.31x = 37,028,964,850.48
  5. Step 5: Solve for x
    x = 37,028,964,850.48/218,405.31
  6. Step 6: Final answer
    x = 169,542.42

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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.