Home / 138,102.72-207,184.44-81,994.02

Finding the Fourth Proportional to 138,102.72, 207,184.44 and 81,994.02

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Solution

The fourth proportional to 138,102.72, 207,184.44 and 81,994.02 is: 123,009.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,102.72 : 207,184.44 = 81,994.02 : x
  2. Step 2: Convert to fraction form
    138,102.72/207,184.44 = 81,994.02/x
  3. Step 3: Cross multiply
    138,102.72x = 207,184.44 × 81,994.02
  4. Step 4: Simplify right side
    138,102.72x = 16,987,885,117.05
  5. Step 5: Solve for x
    x = 16,987,885,117.05/138,102.72
  6. Step 6: Final answer
    x = 123,009.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.