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Finding the Fourth Proportional to 136,680.92, 205,020.16 and 43,186.68

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Solution

The fourth proportional to 136,680.92, 205,020.16 and 43,186.68 is: 64,779.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,680.92 : 205,020.16 = 43,186.68 : x
  2. Step 2: Convert to fraction form
    136,680.92/205,020.16 = 43,186.68/x
  3. Step 3: Cross multiply
    136,680.92x = 205,020.16 × 43,186.68
  4. Step 4: Simplify right side
    136,680.92x = 8,854,140,043.47
  5. Step 5: Solve for x
    x = 8,854,140,043.47/136,680.92
  6. Step 6: Final answer
    x = 64,779.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.