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Finding the Fourth Proportional to 208,613.49, 312,944.66 and 66,408.94

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Solution

The fourth proportional to 208,613.49, 312,944.66 and 66,408.94 is: 99,621.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,613.49 : 312,944.66 = 66,408.94 : x
  2. Step 2: Convert to fraction form
    208,613.49/312,944.66 = 66,408.94/x
  3. Step 3: Cross multiply
    208,613.49x = 312,944.66 × 66,408.94
  4. Step 4: Simplify right side
    208,613.49x = 20,782,322,950.82
  5. Step 5: Solve for x
    x = 20,782,322,950.82/208,613.49
  6. Step 6: Final answer
    x = 99,621.19

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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.