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Finding the Fourth Proportional to 72,998.62, 100,738.12 and 39,464.62

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Solution

The fourth proportional to 72,998.62, 100,738.12 and 39,464.62 is: 54,461.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,998.62 : 100,738.12 = 39,464.62 : x
  2. Step 2: Convert to fraction form
    72,998.62/100,738.12 = 39,464.62/x
  3. Step 3: Cross multiply
    72,998.62x = 100,738.12 × 39,464.62
  4. Step 4: Simplify right side
    72,998.62x = 3,975,591,625.31
  5. Step 5: Solve for x
    x = 3,975,591,625.31/72,998.62
  6. Step 6: Final answer
    x = 54,461.19

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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.