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Finding the Fourth Proportional to 261,228.42, 391,898.79 and 136,535.94

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Solution

The fourth proportional to 261,228.42, 391,898.79 and 136,535.94 is: 204,833.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,228.42 : 391,898.79 = 136,535.94 : x
  2. Step 2: Convert to fraction form
    261,228.42/391,898.79 = 136,535.94/x
  3. Step 3: Cross multiply
    261,228.42x = 391,898.79 × 136,535.94
  4. Step 4: Simplify right side
    261,228.42x = 53,508,269,677.51
  5. Step 5: Solve for x
    x = 53,508,269,677.51/261,228.42
  6. Step 6: Final answer
    x = 204,833.26

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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.