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Finding the Fourth Proportional to 66,069.76, 99,111.68 and 19,322.88

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Solution

The fourth proportional to 66,069.76, 99,111.68 and 19,322.88 is: 28,986.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,069.76 : 99,111.68 = 19,322.88 : x
  2. Step 2: Convert to fraction form
    66,069.76/99,111.68 = 19,322.88/x
  3. Step 3: Cross multiply
    66,069.76x = 99,111.68 × 19,322.88
  4. Step 4: Simplify right side
    66,069.76x = 1,915,123,099.24
  5. Step 5: Solve for x
    x = 1,915,123,099.24/66,069.76
  6. Step 6: Final answer
    x = 28,986.38

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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.