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Finding the Fourth Proportional to 68,808.57, 103,212.32 and 18,888.48

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Solution

The fourth proportional to 68,808.57, 103,212.32 and 18,888.48 is: 28,332.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,808.57 : 103,212.32 = 18,888.48 : x
  2. Step 2: Convert to fraction form
    68,808.57/103,212.32 = 18,888.48/x
  3. Step 3: Cross multiply
    68,808.57x = 103,212.32 × 18,888.48
  4. Step 4: Simplify right side
    68,808.57x = 1,949,523,747.63
  5. Step 5: Solve for x
    x = 1,949,523,747.63/68,808.57
  6. Step 6: Final answer
    x = 28,332.57

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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.