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Finding the Fourth Proportional to 136,091.48, 204,109.80 and 85,467.90

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Solution

The fourth proportional to 136,091.48, 204,109.80 and 85,467.90 is: 128,184.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,091.48 : 204,109.80 = 85,467.90 : x
  2. Step 2: Convert to fraction form
    136,091.48/204,109.80 = 85,467.90/x
  3. Step 3: Cross multiply
    136,091.48x = 204,109.80 × 85,467.90
  4. Step 4: Simplify right side
    136,091.48x = 17,444,835,975.42
  5. Step 5: Solve for x
    x = 17,444,835,975.42/136,091.48
  6. Step 6: Final answer
    x = 128,184.63

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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.