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Finding the Fourth Proportional to 66,636.22, 91,831.44 and 47,740.54

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Solution

The fourth proportional to 66,636.22, 91,831.44 and 47,740.54 is: 65,791.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,636.22 : 91,831.44 = 47,740.54 : x
  2. Step 2: Convert to fraction form
    66,636.22/91,831.44 = 47,740.54/x
  3. Step 3: Cross multiply
    66,636.22x = 91,831.44 × 47,740.54
  4. Step 4: Simplify right side
    66,636.22x = 4,384,082,534.58
  5. Step 5: Solve for x
    x = 4,384,082,534.58/66,636.22
  6. Step 6: Final answer
    x = 65,791.28

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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.