Home / 71,687.04-98,930.40-39,857.28

Finding the Fourth Proportional to 71,687.04, 98,930.40 and 39,857.28

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Solution

The fourth proportional to 71,687.04, 98,930.40 and 39,857.28 is: 55,004.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,687.04 : 98,930.40 = 39,857.28 : x
  2. Step 2: Convert to fraction form
    71,687.04/98,930.40 = 39,857.28/x
  3. Step 3: Cross multiply
    71,687.04x = 98,930.40 × 39,857.28
  4. Step 4: Simplify right side
    71,687.04x = 3,943,096,653.31
  5. Step 5: Solve for x
    x = 3,943,096,653.31/71,687.04
  6. Step 6: Final answer
    x = 55,004.32

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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.