Home / 119,120.70-164,395.19-78,764.48

Finding the Fourth Proportional to 119,120.70, 164,395.19 and 78,764.48

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Solution

The fourth proportional to 119,120.70, 164,395.19 and 78,764.48 is: 108,700.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,120.70 : 164,395.19 = 78,764.48 : x
  2. Step 2: Convert to fraction form
    119,120.70/164,395.19 = 78,764.48/x
  3. Step 3: Cross multiply
    119,120.70x = 164,395.19 × 78,764.48
  4. Step 4: Simplify right side
    119,120.70x = 12,948,501,029.79
  5. Step 5: Solve for x
    x = 12,948,501,029.79/119,120.70
  6. Step 6: Final answer
    x = 108,700.68

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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.