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Finding the Fourth Proportional to 66,897.72, 100,346.55 and 20,150.60

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Solution

The fourth proportional to 66,897.72, 100,346.55 and 20,150.60 is: 30,225.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,897.72 : 100,346.55 = 20,150.60 : x
  2. Step 2: Convert to fraction form
    66,897.72/100,346.55 = 20,150.60/x
  3. Step 3: Cross multiply
    66,897.72x = 100,346.55 × 20,150.60
  4. Step 4: Simplify right side
    66,897.72x = 2,022,042,688.70
  5. Step 5: Solve for x
    x = 2,022,042,688.70/66,897.72
  6. Step 6: Final answer
    x = 30,225.88

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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.