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Finding the Fourth Proportional to 63,652.78, 87,161.78 and 61,143.20

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Solution

The fourth proportional to 63,652.78, 87,161.78 and 61,143.20 is: 83,725.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,652.78 : 87,161.78 = 61,143.20 : x
  2. Step 2: Convert to fraction form
    63,652.78/87,161.78 = 61,143.20/x
  3. Step 3: Cross multiply
    63,652.78x = 87,161.78 × 61,143.20
  4. Step 4: Simplify right side
    63,652.78x = 5,329,349,863.95
  5. Step 5: Solve for x
    x = 5,329,349,863.95/63,652.78
  6. Step 6: Final answer
    x = 83,725.33

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.