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Finding the Fourth Proportional to 128,335.78, 192,536.52 and 53,431.03

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Solution

The fourth proportional to 128,335.78, 192,536.52 and 53,431.03 is: 80,160.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,335.78 : 192,536.52 = 53,431.03 : x
  2. Step 2: Convert to fraction form
    128,335.78/192,536.52 = 53,431.03/x
  3. Step 3: Cross multiply
    128,335.78x = 192,536.52 × 53,431.03
  4. Step 4: Simplify right side
    128,335.78x = 10,287,424,576.22
  5. Step 5: Solve for x
    x = 10,287,424,576.22/128,335.78
  6. Step 6: Final answer
    x = 80,160.22

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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.