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Finding the Fourth Proportional to 121,751, 168,016.38 and 73,995.44

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Solution

The fourth proportional to 121,751, 168,016.38 and 73,995.44 is: 102,113.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,751 : 168,016.38 = 73,995.44 : x
  2. Step 2: Convert to fraction form
    121,751/168,016.38 = 73,995.44/x
  3. Step 3: Cross multiply
    121,751x = 168,016.38 × 73,995.44
  4. Step 4: Simplify right side
    121,751x = 12,432,445,965.31
  5. Step 5: Solve for x
    x = 12,432,445,965.31/121,751
  6. Step 6: Final answer
    x = 102,113.71

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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.