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Finding the Fourth Proportional to 73,138.10, 100,929.98 and 39,604.10

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Solution

The fourth proportional to 73,138.10, 100,929.98 and 39,604.10 is: 54,653.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,138.10 : 100,929.98 = 39,604.10 : x
  2. Step 2: Convert to fraction form
    73,138.10/100,929.98 = 39,604.10/x
  3. Step 3: Cross multiply
    73,138.10x = 100,929.98 × 39,604.10
  4. Step 4: Simplify right side
    73,138.10x = 3,997,240,318.25
  5. Step 5: Solve for x
    x = 3,997,240,318.25/73,138.10
  6. Step 6: Final answer
    x = 54,653.33

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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.