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Finding the Fourth Proportional to 66,647.28, 99,970.80 and 17,399.28

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Solution

The fourth proportional to 66,647.28, 99,970.80 and 17,399.28 is: 26,098.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,647.28 : 99,970.80 = 17,399.28 : x
  2. Step 2: Convert to fraction form
    66,647.28/99,970.80 = 17,399.28/x
  3. Step 3: Cross multiply
    66,647.28x = 99,970.80 × 17,399.28
  4. Step 4: Simplify right side
    66,647.28x = 1,739,419,941.02
  5. Step 5: Solve for x
    x = 1,739,419,941.02/66,647.28
  6. Step 6: Final answer
    x = 26,098.89

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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.