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Finding the Fourth Proportional to 128,538.63, 192,556.85 and 88,550.55

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Solution

The fourth proportional to 128,538.63, 192,556.85 and 88,550.55 is: 132,652.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,538.63 : 192,556.85 = 88,550.55 : x
  2. Step 2: Convert to fraction form
    128,538.63/192,556.85 = 88,550.55/x
  3. Step 3: Cross multiply
    128,538.63x = 192,556.85 × 88,550.55
  4. Step 4: Simplify right side
    128,538.63x = 17,051,014,531.01
  5. Step 5: Solve for x
    x = 17,051,014,531.01/128,538.63
  6. Step 6: Final answer
    x = 132,652.84

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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.