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Finding the Fourth Proportional to 217,289.48, 299,873.34 and 121,796.20

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Solution

The fourth proportional to 217,289.48, 299,873.34 and 121,796.20 is: 168,086.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,289.48 : 299,873.34 = 121,796.20 : x
  2. Step 2: Convert to fraction form
    217,289.48/299,873.34 = 121,796.20/x
  3. Step 3: Cross multiply
    217,289.48x = 299,873.34 × 121,796.20
  4. Step 4: Simplify right side
    217,289.48x = 36,523,433,293.31
  5. Step 5: Solve for x
    x = 36,523,433,293.31/217,289.48
  6. Step 6: Final answer
    x = 168,086.52

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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.