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Finding the Fourth Proportional to 136,620.70, 204,712.35 and 89,818.90

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Solution

The fourth proportional to 136,620.70, 204,712.35 and 89,818.90 is: 134,584.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,620.70 : 204,712.35 = 89,818.90 : x
  2. Step 2: Convert to fraction form
    136,620.70/204,712.35 = 89,818.90/x
  3. Step 3: Cross multiply
    136,620.70x = 204,712.35 × 89,818.90
  4. Step 4: Simplify right side
    136,620.70x = 18,387,038,093.42
  5. Step 5: Solve for x
    x = 18,387,038,093.42/136,620.70
  6. Step 6: Final answer
    x = 134,584.57

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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.