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Finding the Fourth Proportional to 221,864.48, 306,168.48 and 121,263.20

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Solution

The fourth proportional to 221,864.48, 306,168.48 and 121,263.20 is: 167,340.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,864.48 : 306,168.48 = 121,263.20 : x
  2. Step 2: Convert to fraction form
    221,864.48/306,168.48 = 121,263.20/x
  3. Step 3: Cross multiply
    221,864.48x = 306,168.48 × 121,263.20
  4. Step 4: Simplify right side
    221,864.48x = 37,126,969,623.94
  5. Step 5: Solve for x
    x = 37,126,969,623.94/221,864.48
  6. Step 6: Final answer
    x = 167,340.76

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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.