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Finding the Fourth Proportional to 92,435.70, 138,653.55 and 73,408.80

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Solution

The fourth proportional to 92,435.70, 138,653.55 and 73,408.80 is: 110,113.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,435.70 : 138,653.55 = 73,408.80 : x
  2. Step 2: Convert to fraction form
    92,435.70/138,653.55 = 73,408.80/x
  3. Step 3: Cross multiply
    92,435.70x = 138,653.55 × 73,408.80
  4. Step 4: Simplify right side
    92,435.70x = 10,178,390,721.24
  5. Step 5: Solve for x
    x = 10,178,390,721.24/92,435.70
  6. Step 6: Final answer
    x = 110,113.20

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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.