Home / 87,991.36-121,436.88-50,271.28

Finding the Fourth Proportional to 87,991.36, 121,436.88 and 50,271.28

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Solution

The fourth proportional to 87,991.36, 121,436.88 and 50,271.28 is: 69,379.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,991.36 : 121,436.88 = 50,271.28 : x
  2. Step 2: Convert to fraction form
    87,991.36/121,436.88 = 50,271.28/x
  3. Step 3: Cross multiply
    87,991.36x = 121,436.88 × 50,271.28
  4. Step 4: Simplify right side
    87,991.36x = 6,104,787,396.81
  5. Step 5: Solve for x
    x = 6,104,787,396.81/87,991.36
  6. Step 6: Final answer
    x = 69,379.40

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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.