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Finding the Fourth Proportional to 66,400.54, 91,632.76 and 36,185.87

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Solution

The fourth proportional to 66,400.54, 91,632.76 and 36,185.87 is: 49,936.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,400.54 : 91,632.76 = 36,185.87 : x
  2. Step 2: Convert to fraction form
    66,400.54/91,632.76 = 36,185.87/x
  3. Step 3: Cross multiply
    66,400.54x = 91,632.76 × 36,185.87
  4. Step 4: Simplify right side
    66,400.54x = 3,315,810,502.01
  5. Step 5: Solve for x
    x = 3,315,810,502.01/66,400.54
  6. Step 6: Final answer
    x = 49,936.50

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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.