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Finding the Fourth Proportional to 61,371.47, 84,664.04 and 39,859.70

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Solution

The fourth proportional to 61,371.47, 84,664.04 and 39,859.70 is: 54,987.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,371.47 : 84,664.04 = 39,859.70 : x
  2. Step 2: Convert to fraction form
    61,371.47/84,664.04 = 39,859.70/x
  3. Step 3: Cross multiply
    61,371.47x = 84,664.04 × 39,859.70
  4. Step 4: Simplify right side
    61,371.47x = 3,374,682,612.57
  5. Step 5: Solve for x
    x = 3,374,682,612.57/61,371.47
  6. Step 6: Final answer
    x = 54,987.81

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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.