Home / 138,349.50-190,922.31-78,733.50

Finding the Fourth Proportional to 138,349.50, 190,922.31 and 78,733.50

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Solution

The fourth proportional to 138,349.50, 190,922.31 and 78,733.50 is: 108,652.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,349.50 : 190,922.31 = 78,733.50 : x
  2. Step 2: Convert to fraction form
    138,349.50/190,922.31 = 78,733.50/x
  3. Step 3: Cross multiply
    138,349.50x = 190,922.31 × 78,733.50
  4. Step 4: Simplify right side
    138,349.50x = 15,031,981,694.39
  5. Step 5: Solve for x
    x = 15,031,981,694.39/138,349.50
  6. Step 6: Final answer
    x = 108,652.23

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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.