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Finding the Fourth Proportional to 70,321.48, 105,556.32 and 68,734.68

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Solution

The fourth proportional to 70,321.48, 105,556.32 and 68,734.68 is: 103,174.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,321.48 : 105,556.32 = 68,734.68 : x
  2. Step 2: Convert to fraction form
    70,321.48/105,556.32 = 68,734.68/x
  3. Step 3: Cross multiply
    70,321.48x = 105,556.32 × 68,734.68
  4. Step 4: Simplify right side
    70,321.48x = 7,255,379,877.18
  5. Step 5: Solve for x
    x = 7,255,379,877.18/70,321.48
  6. Step 6: Final answer
    x = 103,174.45

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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.