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Finding the Fourth Proportional to 65,805.60, 98,708.40 and 40,436.40

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Solution

The fourth proportional to 65,805.60, 98,708.40 and 40,436.40 is: 60,654.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,805.60 : 98,708.40 = 40,436.40 : x
  2. Step 2: Convert to fraction form
    65,805.60/98,708.40 = 40,436.40/x
  3. Step 3: Cross multiply
    65,805.60x = 98,708.40 × 40,436.40
  4. Step 4: Simplify right side
    65,805.60x = 3,991,412,345.76
  5. Step 5: Solve for x
    x = 3,991,412,345.76/65,805.60
  6. Step 6: Final answer
    x = 60,654.60

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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.