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Finding the Fourth Proportional to 62,880.60, 86,812.19 and 39,020.43

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Solution

The fourth proportional to 62,880.60, 86,812.19 and 39,020.43 is: 53,871.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,880.60 : 86,812.19 = 39,020.43 : x
  2. Step 2: Convert to fraction form
    62,880.60/86,812.19 = 39,020.43/x
  3. Step 3: Cross multiply
    62,880.60x = 86,812.19 × 39,020.43
  4. Step 4: Simplify right side
    62,880.60x = 3,387,448,787.94
  5. Step 5: Solve for x
    x = 3,387,448,787.94/62,880.60
  6. Step 6: Final answer
    x = 53,871.13

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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.