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Finding the Fourth Proportional to 62,842.75, 86,736.21 and 39,857.69

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Solution

The fourth proportional to 62,842.75, 86,736.21 and 39,857.69 is: 55,011.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,842.75 : 86,736.21 = 39,857.69 : x
  2. Step 2: Convert to fraction form
    62,842.75/86,736.21 = 39,857.69/x
  3. Step 3: Cross multiply
    62,842.75x = 86,736.21 × 39,857.69
  4. Step 4: Simplify right side
    62,842.75x = 3,457,104,969.95
  5. Step 5: Solve for x
    x = 3,457,104,969.95/62,842.75
  6. Step 6: Final answer
    x = 55,011.99

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1.5x scale

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.