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Finding the Fourth Proportional to 69,951.60, 104,888.93 and 47,790

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Solution

The fourth proportional to 69,951.60, 104,888.93 and 47,790 is: 71,658.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,951.60 : 104,888.93 = 47,790 : x
  2. Step 2: Convert to fraction form
    69,951.60/104,888.93 = 47,790/x
  3. Step 3: Cross multiply
    69,951.60x = 104,888.93 × 47,790
  4. Step 4: Simplify right side
    69,951.60x = 5,012,641,725.75
  5. Step 5: Solve for x
    x = 5,012,641,725.75/69,951.60
  6. Step 6: Final answer
    x = 71,658.71

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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.