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Finding the Fourth Proportional to 69,054.40, 103,658.40 and 42,788.80

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Solution

The fourth proportional to 69,054.40, 103,658.40 and 42,788.80 is: 64,230.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,054.40 : 103,658.40 = 42,788.80 : x
  2. Step 2: Convert to fraction form
    69,054.40/103,658.40 = 42,788.80/x
  3. Step 3: Cross multiply
    69,054.40x = 103,658.40 × 42,788.80
  4. Step 4: Simplify right side
    69,054.40x = 4,435,418,545.92
  5. Step 5: Solve for x
    x = 4,435,418,545.92/69,054.40
  6. Step 6: Final answer
    x = 64,230.79

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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.