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Finding the Fourth Proportional to 121,745.69, 168,005.83 and 68,031.15

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Solution

The fourth proportional to 121,745.69, 168,005.83 and 68,031.15 is: 93,881.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,745.69 : 168,005.83 = 68,031.15 : x
  2. Step 2: Convert to fraction form
    121,745.69/168,005.83 = 68,031.15/x
  3. Step 3: Cross multiply
    121,745.69x = 168,005.83 × 68,031.15
  4. Step 4: Simplify right side
    121,745.69x = 11,429,629,906.64
  5. Step 5: Solve for x
    x = 11,429,629,906.64/121,745.69
  6. Step 6: Final answer
    x = 93,881.19

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1.5x scale

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.