Home / 112,868.20-168,956.70-81,764.20

Finding the Fourth Proportional to 112,868.20, 168,956.70 and 81,764.20

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Solution

The fourth proportional to 112,868.20, 168,956.70 and 81,764.20 is: 122,395.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,868.20 : 168,956.70 = 81,764.20 : x
  2. Step 2: Convert to fraction form
    112,868.20/168,956.70 = 81,764.20/x
  3. Step 3: Cross multiply
    112,868.20x = 168,956.70 × 81,764.20
  4. Step 4: Simplify right side
    112,868.20x = 13,814,609,410.14
  5. Step 5: Solve for x
    x = 13,814,609,410.14/112,868.20
  6. Step 6: Final answer
    x = 122,395.94

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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.