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Finding the Fourth Proportional to 103,470.10, 155,168.70 and 36,912.40

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Solution

The fourth proportional to 103,470.10, 155,168.70 and 36,912.40 is: 55,355.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,470.10 : 155,168.70 = 36,912.40 : x
  2. Step 2: Convert to fraction form
    103,470.10/155,168.70 = 36,912.40/x
  3. Step 3: Cross multiply
    103,470.10x = 155,168.70 × 36,912.40
  4. Step 4: Simplify right side
    103,470.10x = 5,727,649,121.88
  5. Step 5: Solve for x
    x = 5,727,649,121.88/103,470.10
  6. Step 6: Final answer
    x = 55,355.60

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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.