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Finding the Fourth Proportional to 208,657.17, 313,010.25 and 66,452.66

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Solution

The fourth proportional to 208,657.17, 313,010.25 and 66,452.66 is: 99,686.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,657.17 : 313,010.25 = 66,452.66 : x
  2. Step 2: Convert to fraction form
    208,657.17/313,010.25 = 66,452.66/x
  3. Step 3: Cross multiply
    208,657.17x = 313,010.25 × 66,452.66
  4. Step 4: Simplify right side
    208,657.17x = 20,800,362,154.71
  5. Step 5: Solve for x
    x = 20,800,362,154.71/208,657.17
  6. Step 6: Final answer
    x = 99,686.78

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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.