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Finding the Fourth Proportional to 211,107.87, 316,687.73 and 68,967.45

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Solution

The fourth proportional to 211,107.87, 316,687.73 and 68,967.45 is: 103,459.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,107.87 : 316,687.73 = 68,967.45 : x
  2. Step 2: Convert to fraction form
    211,107.87/316,687.73 = 68,967.45/x
  3. Step 3: Cross multiply
    211,107.87x = 316,687.73 × 68,967.45
  4. Step 4: Simplify right side
    211,107.87x = 21,841,144,839.55
  5. Step 5: Solve for x
    x = 21,841,144,839.55/211,107.87
  6. Step 6: Final answer
    x = 103,459.64

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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.