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Finding the Fourth Proportional to 62,980.16, 86,954.44 and 39,142.40

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Solution

The fourth proportional to 62,980.16, 86,954.44 and 39,142.40 is: 54,042.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,980.16 : 86,954.44 = 39,142.40 : x
  2. Step 2: Convert to fraction form
    62,980.16/86,954.44 = 39,142.40/x
  3. Step 3: Cross multiply
    62,980.16x = 86,954.44 × 39,142.40
  4. Step 4: Simplify right side
    62,980.16x = 3,403,605,472.26
  5. Step 5: Solve for x
    x = 3,403,605,472.26/62,980.16
  6. Step 6: Final answer
    x = 54,042.50

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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.