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Finding the Fourth Proportional to 136,606.10, 204,690.45 and 86,596.70

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Solution

The fourth proportional to 136,606.10, 204,690.45 and 86,596.70 is: 129,756.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,606.10 : 204,690.45 = 86,596.70 : x
  2. Step 2: Convert to fraction form
    136,606.10/204,690.45 = 86,596.70/x
  3. Step 3: Cross multiply
    136,606.10x = 204,690.45 × 86,596.70
  4. Step 4: Simplify right side
    136,606.10x = 17,725,517,491.52
  5. Step 5: Solve for x
    x = 17,725,517,491.52/136,606.10
  6. Step 6: Final answer
    x = 129,756.41

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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.