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Finding the Fourth Proportional to 65,736.55, 90,726.16 and 48,716.91

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Solution

The fourth proportional to 65,736.55, 90,726.16 and 48,716.91 is: 67,236.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,736.55 : 90,726.16 = 48,716.91 : x
  2. Step 2: Convert to fraction form
    65,736.55/90,726.16 = 48,716.91/x
  3. Step 3: Cross multiply
    65,736.55x = 90,726.16 × 48,716.91
  4. Step 4: Simplify right side
    65,736.55x = 4,419,897,655.40
  5. Step 5: Solve for x
    x = 4,419,897,655.40/65,736.55
  6. Step 6: Final answer
    x = 67,236.53

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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.