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Finding the Fourth Proportional to 66,436.80, 99,655.20 and 65,745.60

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Solution

The fourth proportional to 66,436.80, 99,655.20 and 65,745.60 is: 98,618.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,436.80 : 99,655.20 = 65,745.60 : x
  2. Step 2: Convert to fraction form
    66,436.80/99,655.20 = 65,745.60/x
  3. Step 3: Cross multiply
    66,436.80x = 99,655.20 × 65,745.60
  4. Step 4: Simplify right side
    66,436.80x = 6,551,890,917.12
  5. Step 5: Solve for x
    x = 6,551,890,917.12/66,436.80
  6. Step 6: Final answer
    x = 98,618.40

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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.