Home / 138,085.43-190,564.35-76,831.96

Finding the Fourth Proportional to 138,085.43, 190,564.35 and 76,831.96

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Solution

The fourth proportional to 138,085.43, 190,564.35 and 76,831.96 is: 106,031.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,085.43 : 190,564.35 = 76,831.96 : x
  2. Step 2: Convert to fraction form
    138,085.43/190,564.35 = 76,831.96/x
  3. Step 3: Cross multiply
    138,085.43x = 190,564.35 × 76,831.96
  4. Step 4: Simplify right side
    138,085.43x = 14,641,431,179.64
  5. Step 5: Solve for x
    x = 14,641,431,179.64/138,085.43
  6. Step 6: Final answer
    x = 106,031.69

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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.