Home / 109,942.40-164,395.20-81,948.80

Finding the Fourth Proportional to 109,942.40, 164,395.20 and 81,948.80

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Solution

The fourth proportional to 109,942.40, 164,395.20 and 81,948.80 is: 122,536.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,942.40 : 164,395.20 = 81,948.80 : x
  2. Step 2: Convert to fraction form
    109,942.40/164,395.20 = 81,948.80/x
  3. Step 3: Cross multiply
    109,942.40x = 164,395.20 × 81,948.80
  4. Step 4: Simplify right side
    109,942.40x = 13,471,989,365.76
  5. Step 5: Solve for x
    x = 13,471,989,365.76/109,942.40
  6. Step 6: Final answer
    x = 122,536.80

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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.