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Finding the Fourth Proportional to 208,719.68, 313,104.42 and 66,515.67

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Solution

The fourth proportional to 208,719.68, 313,104.42 and 66,515.67 is: 99,781.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,719.68 : 313,104.42 = 66,515.67 : x
  2. Step 2: Convert to fraction form
    208,719.68/313,104.42 = 66,515.67/x
  3. Step 3: Cross multiply
    208,719.68x = 313,104.42 × 66,515.67
  4. Step 4: Simplify right side
    208,719.68x = 20,826,350,276.26
  5. Step 5: Solve for x
    x = 20,826,350,276.26/208,719.68
  6. Step 6: Final answer
    x = 99,781.44

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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.