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Finding the Fourth Proportional to 68,723.79, 103,101.83 and 21,336.47

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Solution

The fourth proportional to 68,723.79, 103,101.83 and 21,336.47 is: 32,009.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,723.79 : 103,101.83 = 21,336.47 : x
  2. Step 2: Convert to fraction form
    68,723.79/103,101.83 = 21,336.47/x
  3. Step 3: Cross multiply
    68,723.79x = 103,101.83 × 21,336.47
  4. Step 4: Simplify right side
    68,723.79x = 2,199,828,480.55
  5. Step 5: Solve for x
    x = 2,199,828,480.55/68,723.79
  6. Step 6: Final answer
    x = 32,009.71

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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.