Home / 138,086.79-190,551.60-76,831.35

Finding the Fourth Proportional to 138,086.79, 190,551.60 and 76,831.35

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Solution

The fourth proportional to 138,086.79, 190,551.60 and 76,831.35 is: 106,022.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,086.79 : 190,551.60 = 76,831.35 : x
  2. Step 2: Convert to fraction form
    138,086.79/190,551.60 = 76,831.35/x
  3. Step 3: Cross multiply
    138,086.79x = 190,551.60 × 76,831.35
  4. Step 4: Simplify right side
    138,086.79x = 14,640,336,672.66
  5. Step 5: Solve for x
    x = 14,640,336,672.66/138,086.79
  6. Step 6: Final answer
    x = 106,022.72

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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.