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Finding the Fourth Proportional to 69,208.60, 103,640.10 and 45,707.80

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Solution

The fourth proportional to 69,208.60, 103,640.10 and 45,707.80 is: 68,447.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,208.60 : 103,640.10 = 45,707.80 : x
  2. Step 2: Convert to fraction form
    69,208.60/103,640.10 = 45,707.80/x
  3. Step 3: Cross multiply
    69,208.60x = 103,640.10 × 45,707.80
  4. Step 4: Simplify right side
    69,208.60x = 4,737,160,962.78
  5. Step 5: Solve for x
    x = 4,737,160,962.78/69,208.60
  6. Step 6: Final answer
    x = 68,447.58

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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.