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Finding the Fourth Proportional to 85,618.60, 128,370.30 and 38,847.40

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Solution

The fourth proportional to 85,618.60, 128,370.30 and 38,847.40 is: 58,244.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,618.60 : 128,370.30 = 38,847.40 : x
  2. Step 2: Convert to fraction form
    85,618.60/128,370.30 = 38,847.40/x
  3. Step 3: Cross multiply
    85,618.60x = 128,370.30 × 38,847.40
  4. Step 4: Simplify right side
    85,618.60x = 4,986,852,392.22
  5. Step 5: Solve for x
    x = 4,986,852,392.22/85,618.60
  6. Step 6: Final answer
    x = 58,244.97

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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.