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Finding the Fourth Proportional to 72,120.92, 99,520.16 and 41,905.92

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Solution

The fourth proportional to 72,120.92, 99,520.16 and 41,905.92 is: 57,826.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,120.92 : 99,520.16 = 41,905.92 : x
  2. Step 2: Convert to fraction form
    72,120.92/99,520.16 = 41,905.92/x
  3. Step 3: Cross multiply
    72,120.92x = 99,520.16 × 41,905.92
  4. Step 4: Simplify right side
    72,120.92x = 4,170,483,863.35
  5. Step 5: Solve for x
    x = 4,170,483,863.35/72,120.92
  6. Step 6: Final answer
    x = 57,826.27

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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.