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Finding the Fourth Proportional to 69,309.81, 103,948.79 and 19,393.44

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Solution

The fourth proportional to 69,309.81, 103,948.79 and 19,393.44 is: 29,085.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,309.81 : 103,948.79 = 19,393.44 : x
  2. Step 2: Convert to fraction form
    69,309.81/103,948.79 = 19,393.44/x
  3. Step 3: Cross multiply
    69,309.81x = 103,948.79 × 19,393.44
  4. Step 4: Simplify right side
    69,309.81x = 2,015,924,135.16
  5. Step 5: Solve for x
    x = 2,015,924,135.16/69,309.81
  6. Step 6: Final answer
    x = 29,085.70

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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.