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Finding the Fourth Proportional to 208,275.17, 312,348.11 and 75,138.08

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Solution

The fourth proportional to 208,275.17, 312,348.11 and 75,138.08 is: 112,683.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,275.17 : 312,348.11 = 75,138.08 : x
  2. Step 2: Convert to fraction form
    208,275.17/312,348.11 = 75,138.08/x
  3. Step 3: Cross multiply
    208,275.17x = 312,348.11 × 75,138.08
  4. Step 4: Simplify right side
    208,275.17x = 23,469,237,464.87
  5. Step 5: Solve for x
    x = 23,469,237,464.87/208,275.17
  6. Step 6: Final answer
    x = 112,683.80

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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.