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Finding the Fourth Proportional to 316,016.66, 436,103.14 and 172,777.88

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Solution

The fourth proportional to 316,016.66, 436,103.14 and 172,777.88 is: 238,433.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,016.66 : 436,103.14 = 172,777.88 : x
  2. Step 2: Convert to fraction form
    316,016.66/436,103.14 = 172,777.88/x
  3. Step 3: Cross multiply
    316,016.66x = 436,103.14 × 172,777.88
  4. Step 4: Simplify right side
    316,016.66x = 75,348,975,990.54
  5. Step 5: Solve for x
    x = 75,348,975,990.54/316,016.66
  6. Step 6: Final answer
    x = 238,433.56

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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.