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Finding the Fourth Proportional to 87,663.57, 120,969.65 and 49,424.48

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Solution

The fourth proportional to 87,663.57, 120,969.65 and 49,424.48 is: 68,202.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,663.57 : 120,969.65 = 49,424.48 : x
  2. Step 2: Convert to fraction form
    87,663.57/120,969.65 = 49,424.48/x
  3. Step 3: Cross multiply
    87,663.57x = 120,969.65 × 49,424.48
  4. Step 4: Simplify right side
    87,663.57x = 5,978,862,019.38
  5. Step 5: Solve for x
    x = 5,978,862,019.38/87,663.57
  6. Step 6: Final answer
    x = 68,202.36

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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.