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Finding the Fourth Proportional to 172,938.13, 257,687.97 and 154,073.21

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Solution

The fourth proportional to 172,938.13, 257,687.97 and 154,073.21 is: 229,578.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,938.13 : 257,687.97 = 154,073.21 : x
  2. Step 2: Convert to fraction form
    172,938.13/257,687.97 = 154,073.21/x
  3. Step 3: Cross multiply
    172,938.13x = 257,687.97 × 154,073.21
  4. Step 4: Simplify right side
    172,938.13x = 39,702,812,716.28
  5. Step 5: Solve for x
    x = 39,702,812,716.28/172,938.13
  6. Step 6: Final answer
    x = 229,578.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.