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Finding the Fourth Proportional to 68,700.48, 103,065.41 and 21,314.54

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Solution

The fourth proportional to 68,700.48, 103,065.41 and 21,314.54 is: 31,976.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,700.48 : 103,065.41 = 21,314.54 : x
  2. Step 2: Convert to fraction form
    68,700.48/103,065.41 = 21,314.54/x
  3. Step 3: Cross multiply
    68,700.48x = 103,065.41 × 21,314.54
  4. Step 4: Simplify right side
    68,700.48x = 2,196,791,182.16
  5. Step 5: Solve for x
    x = 2,196,791,182.16/68,700.48
  6. Step 6: Final answer
    x = 31,976.36

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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.