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Finding the Fourth Proportional to 217,078.38, 299,580.12 and 121,598.82

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Solution

The fourth proportional to 217,078.38, 299,580.12 and 121,598.82 is: 167,813.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,078.38 : 299,580.12 = 121,598.82 : x
  2. Step 2: Convert to fraction form
    217,078.38/299,580.12 = 121,598.82/x
  3. Step 3: Cross multiply
    217,078.38x = 299,580.12 × 121,598.82
  4. Step 4: Simplify right side
    217,078.38x = 36,428,589,087.46
  5. Step 5: Solve for x
    x = 36,428,589,087.46/217,078.38
  6. Step 6: Final answer
    x = 167,813.07

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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.