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Finding the Fourth Proportional to 128,794.46, 193,237.65 and 78,296.22

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Solution

The fourth proportional to 128,794.46, 193,237.65 and 78,296.22 is: 117,472.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,794.46 : 193,237.65 = 78,296.22 : x
  2. Step 2: Convert to fraction form
    128,794.46/193,237.65 = 78,296.22/x
  3. Step 3: Cross multiply
    128,794.46x = 193,237.65 × 78,296.22
  4. Step 4: Simplify right side
    128,794.46x = 15,129,777,556.68
  5. Step 5: Solve for x
    x = 15,129,777,556.68/128,794.46
  6. Step 6: Final answer
    x = 117,472.27

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1.5x scale

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.