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Finding the Fourth Proportional to 66,801.60, 100,172.88 and 20,045.52

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Solution

The fourth proportional to 66,801.60, 100,172.88 and 20,045.52 is: 30,059.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,801.60 : 100,172.88 = 20,045.52 : x
  2. Step 2: Convert to fraction form
    66,801.60/100,172.88 = 20,045.52/x
  3. Step 3: Cross multiply
    66,801.60x = 100,172.88 × 20,045.52
  4. Step 4: Simplify right side
    66,801.60x = 2,008,017,469.50
  5. Step 5: Solve for x
    x = 2,008,017,469.50/66,801.60
  6. Step 6: Final answer
    x = 30,059.42

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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.