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Finding the Fourth Proportional to 211,016.34, 316,552.30 and 68,811.68

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Solution

The fourth proportional to 211,016.34, 316,552.30 and 68,811.68 is: 103,226.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,016.34 : 316,552.30 = 68,811.68 : x
  2. Step 2: Convert to fraction form
    211,016.34/316,552.30 = 68,811.68/x
  3. Step 3: Cross multiply
    211,016.34x = 316,552.30 × 68,811.68
  4. Step 4: Simplify right side
    211,016.34x = 21,782,494,796.67
  5. Step 5: Solve for x
    x = 21,782,494,796.67/211,016.34
  6. Step 6: Final answer
    x = 103,226.58

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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.