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Finding the Fourth Proportional to 69,093.40, 103,640.10 and 47,988.85

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Solution

The fourth proportional to 69,093.40, 103,640.10 and 47,988.85 is: 71,983.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,093.40 : 103,640.10 = 47,988.85 : x
  2. Step 2: Convert to fraction form
    69,093.40/103,640.10 = 47,988.85/x
  3. Step 3: Cross multiply
    69,093.40x = 103,640.10 × 47,988.85
  4. Step 4: Simplify right side
    69,093.40x = 4,973,569,212.89
  5. Step 5: Solve for x
    x = 4,973,569,212.89/69,093.40
  6. Step 6: Final answer
    x = 71,983.28

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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.