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Finding the Fourth Proportional to 65,756.52, 90,737.70 and 38,909.16

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Solution

The fourth proportional to 65,756.52, 90,737.70 and 38,909.16 is: 53,690.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,756.52 : 90,737.70 = 38,909.16 : x
  2. Step 2: Convert to fraction form
    65,756.52/90,737.70 = 38,909.16/x
  3. Step 3: Cross multiply
    65,756.52x = 90,737.70 × 38,909.16
  4. Step 4: Simplify right side
    65,756.52x = 3,530,527,687.33
  5. Step 5: Solve for x
    x = 3,530,527,687.33/65,756.52
  6. Step 6: Final answer
    x = 53,690.91

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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.