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Finding the Fourth Proportional to 208,544.90, 312,817.35 and 75,445.70

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Solution

The fourth proportional to 208,544.90, 312,817.35 and 75,445.70 is: 113,168.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,544.90 : 312,817.35 = 75,445.70 : x
  2. Step 2: Convert to fraction form
    208,544.90/312,817.35 = 75,445.70/x
  3. Step 3: Cross multiply
    208,544.90x = 312,817.35 × 75,445.70
  4. Step 4: Simplify right side
    208,544.90x = 23,600,723,942.90
  5. Step 5: Solve for x
    x = 23,600,723,942.90/208,544.90
  6. Step 6: Final answer
    x = 113,168.55

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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.