Home / 87,809.42-121,178.85-51,986.36

Finding the Fourth Proportional to 87,809.42, 121,178.85 and 51,986.36

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Solution

The fourth proportional to 87,809.42, 121,178.85 and 51,986.36 is: 71,742.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,809.42 : 121,178.85 = 51,986.36 : x
  2. Step 2: Convert to fraction form
    87,809.42/121,178.85 = 51,986.36/x
  3. Step 3: Cross multiply
    87,809.42x = 121,178.85 × 51,986.36
  4. Step 4: Simplify right side
    87,809.42x = 6,299,647,320.49
  5. Step 5: Solve for x
    x = 6,299,647,320.49/87,809.42
  6. Step 6: Final answer
    x = 71,742.27

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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.