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Finding the Fourth Proportional to 172,938.40, 259,229.28 and 125,434.56

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Solution

The fourth proportional to 172,938.40, 259,229.28 and 125,434.56 is: 188,022.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,938.40 : 259,229.28 = 125,434.56 : x
  2. Step 2: Convert to fraction form
    172,938.40/259,229.28 = 125,434.56/x
  3. Step 3: Cross multiply
    172,938.40x = 259,229.28 × 125,434.56
  4. Step 4: Simplify right side
    172,938.40x = 32,516,310,675.92
  5. Step 5: Solve for x
    x = 32,516,310,675.92/172,938.40
  6. Step 6: Final answer
    x = 188,022.50

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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.