Home / 100,076.64-137,946.96-78,822.24

Finding the Fourth Proportional to 100,076.64, 137,946.96 and 78,822.24

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Solution

The fourth proportional to 100,076.64, 137,946.96 and 78,822.24 is: 108,649.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,076.64 : 137,946.96 = 78,822.24 : x
  2. Step 2: Convert to fraction form
    100,076.64/137,946.96 = 78,822.24/x
  3. Step 3: Cross multiply
    100,076.64x = 137,946.96 × 78,822.24
  4. Step 4: Simplify right side
    100,076.64x = 10,873,288,388.39
  5. Step 5: Solve for x
    x = 10,873,288,388.39/100,076.64
  6. Step 6: Final answer
    x = 108,649.61

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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.