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Finding the Fourth Proportional to 66,561.64, 91,851.30 and 39,734.44

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Solution

The fourth proportional to 66,561.64, 91,851.30 and 39,734.44 is: 54,831.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,561.64 : 91,851.30 = 39,734.44 : x
  2. Step 2: Convert to fraction form
    66,561.64/91,851.30 = 39,734.44/x
  3. Step 3: Cross multiply
    66,561.64x = 91,851.30 × 39,734.44
  4. Step 4: Simplify right side
    66,561.64x = 3,649,659,968.77
  5. Step 5: Solve for x
    x = 3,649,659,968.77/66,561.64
  6. Step 6: Final answer
    x = 54,831.28

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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.