Home / 138,231.40-190,711.78-83,801.12

Finding the Fourth Proportional to 138,231.40, 190,711.78 and 83,801.12

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Solution

The fourth proportional to 138,231.40, 190,711.78 and 83,801.12 is: 115,616.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,231.40 : 190,711.78 = 83,801.12 : x
  2. Step 2: Convert to fraction form
    138,231.40/190,711.78 = 83,801.12/x
  3. Step 3: Cross multiply
    138,231.40x = 190,711.78 × 83,801.12
  4. Step 4: Simplify right side
    138,231.40x = 15,981,860,761.19
  5. Step 5: Solve for x
    x = 15,981,860,761.19/138,231.40
  6. Step 6: Final answer
    x = 115,616.72

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1.5x scale

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.