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Finding the Fourth Proportional to 103,415.70, 155,136.78 and 36,862.55

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Solution

The fourth proportional to 103,415.70, 155,136.78 and 36,862.55 is: 55,298.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,415.70 : 155,136.78 = 36,862.55 : x
  2. Step 2: Convert to fraction form
    103,415.70/155,136.78 = 36,862.55/x
  3. Step 3: Cross multiply
    103,415.70x = 155,136.78 × 36,862.55
  4. Step 4: Simplify right side
    103,415.70x = 5,718,737,309.59
  5. Step 5: Solve for x
    x = 5,718,737,309.59/103,415.70
  6. Step 6: Final answer
    x = 55,298.54

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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.