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Finding the Fourth Proportional to 62,275, 85,939.52 and 39,919

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Solution

The fourth proportional to 62,275, 85,939.52 and 39,919 is: 55,088.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,275 : 85,939.52 = 39,919 : x
  2. Step 2: Convert to fraction form
    62,275/85,939.52 = 39,919/x
  3. Step 3: Cross multiply
    62,275x = 85,939.52 × 39,919
  4. Step 4: Simplify right side
    62,275x = 3,430,619,698.88
  5. Step 5: Solve for x
    x = 3,430,619,698.88/62,275
  6. Step 6: Final answer
    x = 55,088.23

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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.