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Finding the Fourth Proportional to 208,214.90, 312,468.15 and 133,516.70

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Solution

The fourth proportional to 208,214.90, 312,468.15 and 133,516.70 is: 200,368.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,214.90 : 312,468.15 = 133,516.70 : x
  2. Step 2: Convert to fraction form
    208,214.90/312,468.15 = 133,516.70/x
  3. Step 3: Cross multiply
    208,214.90x = 312,468.15 × 133,516.70
  4. Step 4: Simplify right side
    208,214.90x = 41,719,716,243.11
  5. Step 5: Solve for x
    x = 41,719,716,243.11/208,214.90
  6. Step 6: Final answer
    x = 200,368.54

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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.