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Finding the Fourth Proportional to 136,575.40, 204,911.70 and 131,715.40

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Solution

The fourth proportional to 136,575.40, 204,911.70 and 131,715.40 is: 197,619.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,575.40 : 204,911.70 = 131,715.40 : x
  2. Step 2: Convert to fraction form
    136,575.40/204,911.70 = 131,715.40/x
  3. Step 3: Cross multiply
    136,575.40x = 204,911.70 × 131,715.40
  4. Step 4: Simplify right side
    136,575.40x = 26,990,026,530.18
  5. Step 5: Solve for x
    x = 26,990,026,530.18/136,575.40
  6. Step 6: Final answer
    x = 197,619.97

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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.