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Finding the Fourth Proportional to 103,951.20, 155,999.70 and 66,602.10

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Solution

The fourth proportional to 103,951.20, 155,999.70 and 66,602.10 is: 99,949.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,951.20 : 155,999.70 = 66,602.10 : x
  2. Step 2: Convert to fraction form
    103,951.20/155,999.70 = 66,602.10/x
  3. Step 3: Cross multiply
    103,951.20x = 155,999.70 × 66,602.10
  4. Step 4: Simplify right side
    103,951.20x = 10,389,907,619.37
  5. Step 5: Solve for x
    x = 10,389,907,619.37/103,951.20
  6. Step 6: Final answer
    x = 99,949.86

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1.5x scale

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.