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Finding the Fourth Proportional to 217,459.29, 300,090.12 and 121,963.92

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Solution

The fourth proportional to 217,459.29, 300,090.12 and 121,963.92 is: 168,308.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,459.29 : 300,090.12 = 121,963.92 : x
  2. Step 2: Convert to fraction form
    217,459.29/300,090.12 = 121,963.92/x
  3. Step 3: Cross multiply
    217,459.29x = 300,090.12 × 121,963.92
  4. Step 4: Simplify right side
    217,459.29x = 36,600,167,388.47
  5. Step 5: Solve for x
    x = 36,600,167,388.47/217,459.29
  6. Step 6: Final answer
    x = 168,308.13

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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.