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Finding the Fourth Proportional to 87,745.92, 121,089 and 47,459.72

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Solution

The fourth proportional to 87,745.92, 121,089 and 47,459.72 is: 65,494.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,745.92 : 121,089 = 47,459.72 : x
  2. Step 2: Convert to fraction form
    87,745.92/121,089 = 47,459.72/x
  3. Step 3: Cross multiply
    87,745.92x = 121,089 × 47,459.72
  4. Step 4: Simplify right side
    87,745.92x = 5,746,850,035.08
  5. Step 5: Solve for x
    x = 5,746,850,035.08/87,745.92
  6. Step 6: Final answer
    x = 65,494.21

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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.