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Finding the Fourth Proportional to 92,775.44, 139,049.20 and 42,786.16

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Solution

The fourth proportional to 92,775.44, 139,049.20 and 42,786.16 is: 64,126.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,775.44 : 139,049.20 = 42,786.16 : x
  2. Step 2: Convert to fraction form
    92,775.44/139,049.20 = 42,786.16/x
  3. Step 3: Cross multiply
    92,775.44x = 139,049.20 × 42,786.16
  4. Step 4: Simplify right side
    92,775.44x = 5,949,381,319.07
  5. Step 5: Solve for x
    x = 5,949,381,319.07/92,775.44
  6. Step 6: Final answer
    x = 64,126.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.