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Finding the Fourth Proportional to 217,298.88, 299,869.76 and 121,805.44

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Solution

The fourth proportional to 217,298.88, 299,869.76 and 121,805.44 is: 168,090.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,298.88 : 299,869.76 = 121,805.44 : x
  2. Step 2: Convert to fraction form
    217,298.88/299,869.76 = 121,805.44/x
  3. Step 3: Cross multiply
    217,298.88x = 299,869.76 × 121,805.44
  4. Step 4: Simplify right side
    217,298.88x = 36,525,768,059.49
  5. Step 5: Solve for x
    x = 36,525,768,059.49/217,298.88
  6. Step 6: Final answer
    x = 168,090.00

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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.