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Finding the Fourth Proportional to 221,812.48, 306,102 and 121,212.64

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Solution

The fourth proportional to 221,812.48, 306,102 and 121,212.64 is: 167,273.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,812.48 : 306,102 = 121,212.64 : x
  2. Step 2: Convert to fraction form
    221,812.48/306,102 = 121,212.64/x
  3. Step 3: Cross multiply
    221,812.48x = 306,102 × 121,212.64
  4. Step 4: Simplify right side
    221,812.48x = 37,103,431,529.28
  5. Step 5: Solve for x
    x = 37,103,431,529.28/221,812.48
  6. Step 6: Final answer
    x = 167,273.87

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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.