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Finding the Fourth Proportional to 73,174.14, 100,980.50 and 39,640.14

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Solution

The fourth proportional to 73,174.14, 100,980.50 and 39,640.14 is: 54,703.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,174.14 : 100,980.50 = 39,640.14 : x
  2. Step 2: Convert to fraction form
    73,174.14/100,980.50 = 39,640.14/x
  3. Step 3: Cross multiply
    73,174.14x = 100,980.50 × 39,640.14
  4. Step 4: Simplify right side
    73,174.14x = 4,002,880,959.07
  5. Step 5: Solve for x
    x = 4,002,880,959.07/73,174.14
  6. Step 6: Final answer
    x = 54,703.49

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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.