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Finding the Fourth Proportional to 67,136.80, 100,641.20 and 25,005.60

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Solution

The fourth proportional to 67,136.80, 100,641.20 and 25,005.60 is: 37,484.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,136.80 : 100,641.20 = 25,005.60 : x
  2. Step 2: Convert to fraction form
    67,136.80/100,641.20 = 25,005.60/x
  3. Step 3: Cross multiply
    67,136.80x = 100,641.20 × 25,005.60
  4. Step 4: Simplify right side
    67,136.80x = 2,516,593,590.72
  5. Step 5: Solve for x
    x = 2,516,593,590.72/67,136.80
  6. Step 6: Final answer
    x = 37,484.56

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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.