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Finding the Fourth Proportional to 66,650.77, 91,978.14 and 38,356.48

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Solution

The fourth proportional to 66,650.77, 91,978.14 and 38,356.48 is: 52,931.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,650.77 : 91,978.14 = 38,356.48 : x
  2. Step 2: Convert to fraction form
    66,650.77/91,978.14 = 38,356.48/x
  3. Step 3: Cross multiply
    66,650.77x = 91,978.14 × 38,356.48
  4. Step 4: Simplify right side
    66,650.77x = 3,527,957,687.35
  5. Step 5: Solve for x
    x = 3,527,957,687.35/66,650.77
  6. Step 6: Final answer
    x = 52,931.99

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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.