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Finding the Fourth Proportional to 69,093.90, 103,640.85 and 47,989.35

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Solution

The fourth proportional to 69,093.90, 103,640.85 and 47,989.35 is: 71,984.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,093.90 : 103,640.85 = 47,989.35 : x
  2. Step 2: Convert to fraction form
    69,093.90/103,640.85 = 47,989.35/x
  3. Step 3: Cross multiply
    69,093.90x = 103,640.85 × 47,989.35
  4. Step 4: Simplify right side
    69,093.90x = 4,973,657,024.95
  5. Step 5: Solve for x
    x = 4,973,657,024.95/69,093.90
  6. Step 6: Final answer
    x = 71,984.03

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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.