Home / 217,118.72-299,589-121,629.44

Finding the Fourth Proportional to 217,118.72, 299,589 and 121,629.44

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Solution

The fourth proportional to 217,118.72, 299,589 and 121,629.44 is: 167,829.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,118.72 : 299,589 = 121,629.44 : x
  2. Step 2: Convert to fraction form
    217,118.72/299,589 = 121,629.44/x
  3. Step 3: Cross multiply
    217,118.72x = 299,589 × 121,629.44
  4. Step 4: Simplify right side
    217,118.72x = 36,438,842,300.16
  5. Step 5: Solve for x
    x = 36,438,842,300.16/217,118.72
  6. Step 6: Final answer
    x = 167,829.11

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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.