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Finding the Fourth Proportional to 66,025.80, 98,909.10 and 39,652.20

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Solution

The fourth proportional to 66,025.80, 98,909.10 and 39,652.20 is: 59,400.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,025.80 : 98,909.10 = 39,652.20 : x
  2. Step 2: Convert to fraction form
    66,025.80/98,909.10 = 39,652.20/x
  3. Step 3: Cross multiply
    66,025.80x = 98,909.10 × 39,652.20
  4. Step 4: Simplify right side
    66,025.80x = 3,921,963,415.02
  5. Step 5: Solve for x
    x = 3,921,963,415.02/66,025.80
  6. Step 6: Final answer
    x = 59,400.47

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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.