Home / 71,669.71-98,907.57-39,839.14

Finding the Fourth Proportional to 71,669.71, 98,907.57 and 39,839.14

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Solution

The fourth proportional to 71,669.71, 98,907.57 and 39,839.14 is: 54,979.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,669.71 : 98,907.57 = 39,839.14 : x
  2. Step 2: Convert to fraction form
    71,669.71/98,907.57 = 39,839.14/x
  3. Step 3: Cross multiply
    71,669.71x = 98,907.57 × 39,839.14
  4. Step 4: Simplify right side
    71,669.71x = 3,940,392,528.29
  5. Step 5: Solve for x
    x = 3,940,392,528.29/71,669.71
  6. Step 6: Final answer
    x = 54,979.89

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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.