Home / 149,142.50-205,820.45-81,163.16

Finding the Fourth Proportional to 149,142.50, 205,820.45 and 81,163.16

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Solution

The fourth proportional to 149,142.50, 205,820.45 and 81,163.16 is: 112,007.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,142.50 : 205,820.45 = 81,163.16 : x
  2. Step 2: Convert to fraction form
    149,142.50/205,820.45 = 81,163.16/x
  3. Step 3: Cross multiply
    149,142.50x = 205,820.45 × 81,163.16
  4. Step 4: Simplify right side
    149,142.50x = 16,705,036,679.70
  5. Step 5: Solve for x
    x = 16,705,036,679.70/149,142.50
  6. Step 6: Final answer
    x = 112,007.22

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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.