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Finding the Fourth Proportional to 69,115.78, 103,690.13 and 22,368.66

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Solution

The fourth proportional to 69,115.78, 103,690.13 and 22,368.66 is: 33,558.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,115.78 : 103,690.13 = 22,368.66 : x
  2. Step 2: Convert to fraction form
    69,115.78/103,690.13 = 22,368.66/x
  3. Step 3: Cross multiply
    69,115.78x = 103,690.13 × 22,368.66
  4. Step 4: Simplify right side
    69,115.78x = 2,319,408,762.64
  5. Step 5: Solve for x
    x = 2,319,408,762.64/69,115.78
  6. Step 6: Final answer
    x = 33,558.31

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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.