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Finding the Fourth Proportional to 103,953.70, 155,930.55 and 102,571.30

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Solution

The fourth proportional to 103,953.70, 155,930.55 and 102,571.30 is: 153,856.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,953.70 : 155,930.55 = 102,571.30 : x
  2. Step 2: Convert to fraction form
    103,953.70/155,930.55 = 102,571.30/x
  3. Step 3: Cross multiply
    103,953.70x = 155,930.55 × 102,571.30
  4. Step 4: Simplify right side
    103,953.70x = 15,993,999,223.22
  5. Step 5: Solve for x
    x = 15,993,999,223.22/103,953.70
  6. Step 6: Final answer
    x = 153,856.95

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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.