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Finding the Fourth Proportional to 77,103.81, 106,408.55 and 43,111.60

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Solution

The fourth proportional to 77,103.81, 106,408.55 and 43,111.60 is: 59,496.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,103.81 : 106,408.55 = 43,111.60 : x
  2. Step 2: Convert to fraction form
    77,103.81/106,408.55 = 43,111.60/x
  3. Step 3: Cross multiply
    77,103.81x = 106,408.55 × 43,111.60
  4. Step 4: Simplify right side
    77,103.81x = 4,587,442,844.18
  5. Step 5: Solve for x
    x = 4,587,442,844.18/77,103.81
  6. Step 6: Final answer
    x = 59,496.97

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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.