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Finding the Fourth Proportional to 221,763, 306,032.94 and 121,161.72

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Solution

The fourth proportional to 221,763, 306,032.94 and 121,161.72 is: 167,203.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,763 : 306,032.94 = 121,161.72 : x
  2. Step 2: Convert to fraction form
    221,763/306,032.94 = 121,161.72/x
  3. Step 3: Cross multiply
    221,763x = 306,032.94 × 121,161.72
  4. Step 4: Simplify right side
    221,763x = 37,079,477,387.06
  5. Step 5: Solve for x
    x = 37,079,477,387.06/221,763
  6. Step 6: Final answer
    x = 167,203.17

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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.