Home / 217,129.09-299,650.45-121,666.54

Finding the Fourth Proportional to 217,129.09, 299,650.45 and 121,666.54

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Solution

The fourth proportional to 217,129.09, 299,650.45 and 121,666.54 is: 167,906.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,129.09 : 299,650.45 = 121,666.54 : x
  2. Step 2: Convert to fraction form
    217,129.09/299,650.45 = 121,666.54/x
  3. Step 3: Cross multiply
    217,129.09x = 299,650.45 × 121,666.54
  4. Step 4: Simplify right side
    217,129.09x = 36,457,433,460.94
  5. Step 5: Solve for x
    x = 36,457,433,460.94/217,129.09
  6. Step 6: Final answer
    x = 167,906.72

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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.