Home / 149,142.16-205,820.51-81,163.52

Finding the Fourth Proportional to 149,142.16, 205,820.51 and 81,163.52

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Solution

The fourth proportional to 149,142.16, 205,820.51 and 81,163.52 is: 112,008.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,142.16 : 205,820.51 = 81,163.52 : x
  2. Step 2: Convert to fraction form
    149,142.16/205,820.51 = 81,163.52/x
  3. Step 3: Cross multiply
    149,142.16x = 205,820.51 × 81,163.52
  4. Step 4: Simplify right side
    149,142.16x = 16,705,117,025.43
  5. Step 5: Solve for x
    x = 16,705,117,025.43/149,142.16
  6. Step 6: Final answer
    x = 112,008.01

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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.