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Finding the Fourth Proportional to 257,066.38, 385,617.93 and 79,550.56

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Solution

The fourth proportional to 257,066.38, 385,617.93 and 79,550.56 is: 119,331.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,066.38 : 385,617.93 = 79,550.56 : x
  2. Step 2: Convert to fraction form
    257,066.38/385,617.93 = 79,550.56/x
  3. Step 3: Cross multiply
    257,066.38x = 385,617.93 × 79,550.56
  4. Step 4: Simplify right side
    257,066.38x = 30,676,122,277.54
  5. Step 5: Solve for x
    x = 30,676,122,277.54/257,066.38
  6. Step 6: Final answer
    x = 119,331.52

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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.