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Finding the Fourth Proportional to 136,018.70, 204,095.10 and 61,191.80

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Solution

The fourth proportional to 136,018.70, 204,095.10 and 61,191.80 is: 91,817.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,018.70 : 204,095.10 = 61,191.80 : x
  2. Step 2: Convert to fraction form
    136,018.70/204,095.10 = 61,191.80/x
  3. Step 3: Cross multiply
    136,018.70x = 204,095.10 × 61,191.80
  4. Step 4: Simplify right side
    136,018.70x = 12,488,946,540.18
  5. Step 5: Solve for x
    x = 12,488,946,540.18/136,018.70
  6. Step 6: Final answer
    x = 91,817.86

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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.