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Finding the Fourth Proportional to 217,298.84, 299,871.45 and 121,805.53

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Solution

The fourth proportional to 217,298.84, 299,871.45 and 121,805.53 is: 168,091.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,298.84 : 299,871.45 = 121,805.53 : x
  2. Step 2: Convert to fraction form
    217,298.84/299,871.45 = 121,805.53/x
  3. Step 3: Cross multiply
    217,298.84x = 299,871.45 × 121,805.53
  4. Step 4: Simplify right side
    217,298.84x = 36,526,002,771.78
  5. Step 5: Solve for x
    x = 36,526,002,771.78/217,298.84
  6. Step 6: Final answer
    x = 168,091.11

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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.