Home / 121,844.72-168,145.24-68,129.58

Finding the Fourth Proportional to 121,844.72, 168,145.24 and 68,129.58

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Solution

The fourth proportional to 121,844.72, 168,145.24 and 68,129.58 is: 94,018.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,844.72 : 168,145.24 = 68,129.58 : x
  2. Step 2: Convert to fraction form
    121,844.72/168,145.24 = 68,129.58/x
  3. Step 3: Cross multiply
    121,844.72x = 168,145.24 × 68,129.58
  4. Step 4: Simplify right side
    121,844.72x = 11,455,664,580.20
  5. Step 5: Solve for x
    x = 11,455,664,580.20/121,844.72
  6. Step 6: Final answer
    x = 94,018.56

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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.