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Finding the Fourth Proportional to 62,256, 85,913.28 and 39,900

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Solution

The fourth proportional to 62,256, 85,913.28 and 39,900 is: 55,062

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,256 : 85,913.28 = 39,900 : x
  2. Step 2: Convert to fraction form
    62,256/85,913.28 = 39,900/x
  3. Step 3: Cross multiply
    62,256x = 85,913.28 × 39,900
  4. Step 4: Simplify right side
    62,256x = 3,427,939,872
  5. Step 5: Solve for x
    x = 3,427,939,872/62,256
  6. Step 6: Final answer
    x = 55,062

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.