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Finding the Fourth Proportional to 69,278.88, 103,918.34 and 16,688.34

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Solution

The fourth proportional to 69,278.88, 103,918.34 and 16,688.34 is: 25,032.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,278.88 : 103,918.34 = 16,688.34 : x
  2. Step 2: Convert to fraction form
    69,278.88/103,918.34 = 16,688.34/x
  3. Step 3: Cross multiply
    69,278.88x = 103,918.34 × 16,688.34
  4. Step 4: Simplify right side
    69,278.88x = 1,734,224,590.16
  5. Step 5: Solve for x
    x = 1,734,224,590.16/69,278.88
  6. Step 6: Final answer
    x = 25,032.51

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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.