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Finding the Fourth Proportional to 136,471.40, 204,735.90 and 42,986.60

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Solution

The fourth proportional to 136,471.40, 204,735.90 and 42,986.60 is: 64,488.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,471.40 : 204,735.90 = 42,986.60 : x
  2. Step 2: Convert to fraction form
    136,471.40/204,735.90 = 42,986.60/x
  3. Step 3: Cross multiply
    136,471.40x = 204,735.90 × 42,986.60
  4. Step 4: Simplify right side
    136,471.40x = 8,800,900,238.94
  5. Step 5: Solve for x
    x = 8,800,900,238.94/136,471.40
  6. Step 6: Final answer
    x = 64,488.97

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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.