Home / 149,197.28-205,894.87-81,216.20

Finding the Fourth Proportional to 149,197.28, 205,894.87 and 81,216.20

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Solution

The fourth proportional to 149,197.28, 205,894.87 and 81,216.20 is: 112,079.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,197.28 : 205,894.87 = 81,216.20 : x
  2. Step 2: Convert to fraction form
    149,197.28/205,894.87 = 81,216.20/x
  3. Step 3: Cross multiply
    149,197.28x = 205,894.87 × 81,216.20
  4. Step 4: Simplify right side
    149,197.28x = 16,721,998,632.77
  5. Step 5: Solve for x
    x = 16,721,998,632.77/149,197.28
  6. Step 6: Final answer
    x = 112,079.78

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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.