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Finding the Fourth Proportional to 86,874.34, 119,831.94 and 66,700.48

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Solution

The fourth proportional to 86,874.34, 119,831.94 and 66,700.48 is: 92,004.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,874.34 : 119,831.94 = 66,700.48 : x
  2. Step 2: Convert to fraction form
    86,874.34/119,831.94 = 66,700.48/x
  3. Step 3: Cross multiply
    86,874.34x = 119,831.94 × 66,700.48
  4. Step 4: Simplify right side
    86,874.34x = 7,992,847,917.33
  5. Step 5: Solve for x
    x = 7,992,847,917.33/86,874.34
  6. Step 6: Final answer
    x = 92,004.70

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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.