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Finding the Fourth Proportional to 62,619.64, 86,424 and 38,754

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Solution

The fourth proportional to 62,619.64, 86,424 and 38,754 is: 53,486.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,619.64 : 86,424 = 38,754 : x
  2. Step 2: Convert to fraction form
    62,619.64/86,424 = 38,754/x
  3. Step 3: Cross multiply
    62,619.64x = 86,424 × 38,754
  4. Step 4: Simplify right side
    62,619.64x = 3,349,275,696
  5. Step 5: Solve for x
    x = 3,349,275,696/62,619.64
  6. Step 6: Final answer
    x = 53,486.03

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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.