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Finding the Fourth Proportional to 65,603.98, 90,530.88 and 38,755.11

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Solution

The fourth proportional to 65,603.98, 90,530.88 and 38,755.11 is: 53,480.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,603.98 : 90,530.88 = 38,755.11 : x
  2. Step 2: Convert to fraction form
    65,603.98/90,530.88 = 38,755.11/x
  3. Step 3: Cross multiply
    65,603.98x = 90,530.88 × 38,755.11
  4. Step 4: Simplify right side
    65,603.98x = 3,508,534,212.80
  5. Step 5: Solve for x
    x = 3,508,534,212.80/65,603.98
  6. Step 6: Final answer
    x = 53,480.51

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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.