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Finding the Fourth Proportional to 136,007.78, 204,040.47 and 42,520.58

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Solution

The fourth proportional to 136,007.78, 204,040.47 and 42,520.58 is: 63,789.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,007.78 : 204,040.47 = 42,520.58 : x
  2. Step 2: Convert to fraction form
    136,007.78/204,040.47 = 42,520.58/x
  3. Step 3: Cross multiply
    136,007.78x = 204,040.47 × 42,520.58
  4. Step 4: Simplify right side
    136,007.78x = 8,675,919,127.87
  5. Step 5: Solve for x
    x = 8,675,919,127.87/136,007.78
  6. Step 6: Final answer
    x = 63,789.87

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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.