Home / 112,977.60-169,660.80-79,929.60

Finding the Fourth Proportional to 112,977.60, 169,660.80 and 79,929.60

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Solution

The fourth proportional to 112,977.60, 169,660.80 and 79,929.60 is: 120,031.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,977.60 : 169,660.80 = 79,929.60 : x
  2. Step 2: Convert to fraction form
    112,977.60/169,660.80 = 79,929.60/x
  3. Step 3: Cross multiply
    112,977.60x = 169,660.80 × 79,929.60
  4. Step 4: Simplify right side
    112,977.60x = 13,560,919,879.68
  5. Step 5: Solve for x
    x = 13,560,919,879.68/112,977.60
  6. Step 6: Final answer
    x = 120,031.93

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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.