Home / 138,199.84-190,765.02-81,611.44

Finding the Fourth Proportional to 138,199.84, 190,765.02 and 81,611.44

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Solution

The fourth proportional to 138,199.84, 190,765.02 and 81,611.44 is: 112,652.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,199.84 : 190,765.02 = 81,611.44 : x
  2. Step 2: Convert to fraction form
    138,199.84/190,765.02 = 81,611.44/x
  3. Step 3: Cross multiply
    138,199.84x = 190,765.02 × 81,611.44
  4. Step 4: Simplify right side
    138,199.84x = 15,568,607,983.83
  5. Step 5: Solve for x
    x = 15,568,607,983.83/138,199.84
  6. Step 6: Final answer
    x = 112,652.87

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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.