Home / 87,727.28-121,054.20-51,918.80

Finding the Fourth Proportional to 87,727.28, 121,054.20 and 51,918.80

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Solution

The fourth proportional to 87,727.28, 121,054.20 and 51,918.80 is: 71,642.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,727.28 : 121,054.20 = 51,918.80 : x
  2. Step 2: Convert to fraction form
    87,727.28/121,054.20 = 51,918.80/x
  3. Step 3: Cross multiply
    87,727.28x = 121,054.20 × 51,918.80
  4. Step 4: Simplify right side
    87,727.28x = 6,284,988,798.96
  5. Step 5: Solve for x
    x = 6,284,988,798.96/87,727.28
  6. Step 6: Final answer
    x = 71,642.35

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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.