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Finding the Fourth Proportional to 72,020.92, 99,383.84 and 40,187.92

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Solution

The fourth proportional to 72,020.92, 99,383.84 and 40,187.92 is: 55,456.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,020.92 : 99,383.84 = 40,187.92 : x
  2. Step 2: Convert to fraction form
    72,020.92/99,383.84 = 40,187.92/x
  3. Step 3: Cross multiply
    72,020.92x = 99,383.84 × 40,187.92
  4. Step 4: Simplify right side
    72,020.92x = 3,994,029,811.21
  5. Step 5: Solve for x
    x = 3,994,029,811.21/72,020.92
  6. Step 6: Final answer
    x = 55,456.52

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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.