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Finding the Fourth Proportional to 216,066.80, 323,927.40 and 91,305.20

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Solution

The fourth proportional to 216,066.80, 323,927.40 and 91,305.20 is: 136,884.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,066.80 : 323,927.40 = 91,305.20 : x
  2. Step 2: Convert to fraction form
    216,066.80/323,927.40 = 91,305.20/x
  3. Step 3: Cross multiply
    216,066.80x = 323,927.40 × 91,305.20
  4. Step 4: Simplify right side
    216,066.80x = 29,576,256,042.48
  5. Step 5: Solve for x
    x = 29,576,256,042.48/216,066.80
  6. Step 6: Final answer
    x = 136,884.78

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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.