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Finding the Fourth Proportional to 72,741.87, 100,383.12 and 40,910.07

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Solution

The fourth proportional to 72,741.87, 100,383.12 and 40,910.07 is: 56,455.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,741.87 : 100,383.12 = 40,910.07 : x
  2. Step 2: Convert to fraction form
    72,741.87/100,383.12 = 40,910.07/x
  3. Step 3: Cross multiply
    72,741.87x = 100,383.12 × 40,910.07
  4. Step 4: Simplify right side
    72,741.87x = 4,106,680,466.02
  5. Step 5: Solve for x
    x = 4,106,680,466.02/72,741.87
  6. Step 6: Final answer
    x = 56,455.53

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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.