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Finding the Fourth Proportional to 217,348.20, 299,952.90 and 121,850.28

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Solution

The fourth proportional to 217,348.20, 299,952.90 and 121,850.28 is: 168,160.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,348.20 : 299,952.90 = 121,850.28 : x
  2. Step 2: Convert to fraction form
    217,348.20/299,952.90 = 121,850.28/x
  3. Step 3: Cross multiply
    217,348.20x = 299,952.90 × 121,850.28
  4. Step 4: Simplify right side
    217,348.20x = 36,549,344,851.81
  5. Step 5: Solve for x
    x = 36,549,344,851.81/217,348.20
  6. Step 6: Final answer
    x = 168,160.33

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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.