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Finding the Fourth Proportional to 65,859.12, 90,885.60 and 36,051.12

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Solution

The fourth proportional to 65,859.12, 90,885.60 and 36,051.12 is: 49,750.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,859.12 : 90,885.60 = 36,051.12 : x
  2. Step 2: Convert to fraction form
    65,859.12/90,885.60 = 36,051.12/x
  3. Step 3: Cross multiply
    65,859.12x = 90,885.60 × 36,051.12
  4. Step 4: Simplify right side
    65,859.12x = 3,276,527,671.87
  5. Step 5: Solve for x
    x = 3,276,527,671.87/65,859.12
  6. Step 6: Final answer
    x = 49,750.55

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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.