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Finding the Fourth Proportional to 223,808.78, 308,855.23 and 121,839.90

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Solution

The fourth proportional to 223,808.78, 308,855.23 and 121,839.90 is: 168,138.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,808.78 : 308,855.23 = 121,839.90 : x
  2. Step 2: Convert to fraction form
    223,808.78/308,855.23 = 121,839.90/x
  3. Step 3: Cross multiply
    223,808.78x = 308,855.23 × 121,839.90
  4. Step 4: Simplify right side
    223,808.78x = 37,630,889,728.48
  5. Step 5: Solve for x
    x = 37,630,889,728.48/223,808.78
  6. Step 6: Final answer
    x = 168,138.58

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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.