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Finding the Fourth Proportional to 66,480.48, 91,757.86 and 42,276.54

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Solution

The fourth proportional to 66,480.48, 91,757.86 and 42,276.54 is: 58,351.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,480.48 : 91,757.86 = 42,276.54 : x
  2. Step 2: Convert to fraction form
    66,480.48/91,757.86 = 42,276.54/x
  3. Step 3: Cross multiply
    66,480.48x = 91,757.86 × 42,276.54
  4. Step 4: Simplify right side
    66,480.48x = 3,879,204,397.83
  5. Step 5: Solve for x
    x = 3,879,204,397.83/66,480.48
  6. Step 6: Final answer
    x = 58,351.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.