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Finding the Fourth Proportional to 68,700.52, 103,065.56 and 21,314.66

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Solution

The fourth proportional to 68,700.52, 103,065.56 and 21,314.66 is: 31,976.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,700.52 : 103,065.56 = 21,314.66 : x
  2. Step 2: Convert to fraction form
    68,700.52/103,065.56 = 21,314.66/x
  3. Step 3: Cross multiply
    68,700.52x = 103,065.56 × 21,314.66
  4. Step 4: Simplify right side
    68,700.52x = 2,196,807,369.11
  5. Step 5: Solve for x
    x = 2,196,807,369.11/68,700.52
  6. Step 6: Final answer
    x = 31,976.58

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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.