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Finding the Fourth Proportional to 217,255.01, 299,811.51 and 121,761.68

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Solution

The fourth proportional to 217,255.01, 299,811.51 and 121,761.68 is: 168,030.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,255.01 : 299,811.51 = 121,761.68 : x
  2. Step 2: Convert to fraction form
    217,255.01/299,811.51 = 121,761.68/x
  3. Step 3: Cross multiply
    217,255.01x = 299,811.51 × 121,761.68
  4. Step 4: Simplify right side
    217,255.01x = 36,505,551,641.88
  5. Step 5: Solve for x
    x = 36,505,551,641.88/217,255.01
  6. Step 6: Final answer
    x = 168,030.89

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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.