Home / 211,417.28-291,757.92-121,976

Finding the Fourth Proportional to 211,417.28, 291,757.92 and 121,976

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Solution

The fourth proportional to 211,417.28, 291,757.92 and 121,976 is: 168,328.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,417.28 : 291,757.92 = 121,976 : x
  2. Step 2: Convert to fraction form
    211,417.28/291,757.92 = 121,976/x
  3. Step 3: Cross multiply
    211,417.28x = 291,757.92 × 121,976
  4. Step 4: Simplify right side
    211,417.28x = 35,587,464,049.92
  5. Step 5: Solve for x
    x = 35,587,464,049.92/211,417.28
  6. Step 6: Final answer
    x = 168,328.08

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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.