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Finding the Fourth Proportional to 132,891.78, 183,383.90 and 72,461.93

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Solution

The fourth proportional to 132,891.78, 183,383.90 and 72,461.93 is: 99,993.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,891.78 : 183,383.90 = 72,461.93 : x
  2. Step 2: Convert to fraction form
    132,891.78/183,383.90 = 72,461.93/x
  3. Step 3: Cross multiply
    132,891.78x = 183,383.90 × 72,461.93
  4. Step 4: Simplify right side
    132,891.78x = 13,288,351,324.93
  5. Step 5: Solve for x
    x = 13,288,351,324.93/132,891.78
  6. Step 6: Final answer
    x = 99,993.78

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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.