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Finding the Fourth Proportional to 65,805.66, 90,817.59 and 38,934.62

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Solution

The fourth proportional to 65,805.66, 90,817.59 and 38,934.62 is: 53,733.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,805.66 : 90,817.59 = 38,934.62 : x
  2. Step 2: Convert to fraction form
    65,805.66/90,817.59 = 38,934.62/x
  3. Step 3: Cross multiply
    65,805.66x = 90,817.59 × 38,934.62
  4. Step 4: Simplify right side
    65,805.66x = 3,535,948,355.97
  5. Step 5: Solve for x
    x = 3,535,948,355.97/65,805.66
  6. Step 6: Final answer
    x = 53,733.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.