Home / 122,709.36-169,286.04-77,351.52

Finding the Fourth Proportional to 122,709.36, 169,286.04 and 77,351.52

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Solution

The fourth proportional to 122,709.36, 169,286.04 and 77,351.52 is: 106,711.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,709.36 : 169,286.04 = 77,351.52 : x
  2. Step 2: Convert to fraction form
    122,709.36/169,286.04 = 77,351.52/x
  3. Step 3: Cross multiply
    122,709.36x = 169,286.04 × 77,351.52
  4. Step 4: Simplify right side
    122,709.36x = 13,094,532,508.78
  5. Step 5: Solve for x
    x = 13,094,532,508.78/122,709.36
  6. Step 6: Final answer
    x = 106,711.77

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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.