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Finding the Fourth Proportional to 71,018.34, 98,004.79 and 40,391.38

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Solution

The fourth proportional to 71,018.34, 98,004.79 and 40,391.38 is: 55,739.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,018.34 : 98,004.79 = 40,391.38 : x
  2. Step 2: Convert to fraction form
    71,018.34/98,004.79 = 40,391.38/x
  3. Step 3: Cross multiply
    71,018.34x = 98,004.79 × 40,391.38
  4. Step 4: Simplify right side
    71,018.34x = 3,958,548,936.14
  5. Step 5: Solve for x
    x = 3,958,548,936.14/71,018.34
  6. Step 6: Final answer
    x = 55,739.81

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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.