Home / 71,749.72-99,013.24-39,918.36

Finding the Fourth Proportional to 71,749.72, 99,013.24 and 39,918.36

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Solution

The fourth proportional to 71,749.72, 99,013.24 and 39,918.36 is: 55,086.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,749.72 : 99,013.24 = 39,918.36 : x
  2. Step 2: Convert to fraction form
    71,749.72/99,013.24 = 39,918.36/x
  3. Step 3: Cross multiply
    71,749.72x = 99,013.24 × 39,918.36
  4. Step 4: Simplify right side
    71,749.72x = 3,952,446,159.09
  5. Step 5: Solve for x
    x = 3,952,446,159.09/71,749.72
  6. Step 6: Final answer
    x = 55,086.57

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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.