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Finding the Fourth Proportional to 323,706.38, 485,756.39 and 136,717.88

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Solution

The fourth proportional to 323,706.38, 485,756.39 and 136,717.88 is: 205,159.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,706.38 : 485,756.39 = 136,717.88 : x
  2. Step 2: Convert to fraction form
    323,706.38/485,756.39 = 136,717.88/x
  3. Step 3: Cross multiply
    323,706.38x = 485,756.39 × 136,717.88
  4. Step 4: Simplify right side
    323,706.38x = 66,411,581,750.27
  5. Step 5: Solve for x
    x = 66,411,581,750.27/323,706.38
  6. Step 6: Final answer
    x = 205,159.94

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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.