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Finding the Fourth Proportional to 221,967.69, 332,918.60 and 81,693.51

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Solution

The fourth proportional to 221,967.69, 332,918.60 and 81,693.51 is: 122,528.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,967.69 : 332,918.60 = 81,693.51 : x
  2. Step 2: Convert to fraction form
    221,967.69/332,918.60 = 81,693.51/x
  3. Step 3: Cross multiply
    221,967.69x = 332,918.60 × 81,693.51
  4. Step 4: Simplify right side
    221,967.69x = 27,197,288,569.82
  5. Step 5: Solve for x
    x = 27,197,288,569.82/221,967.69
  6. Step 6: Final answer
    x = 122,528.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.