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Finding the Fourth Proportional to 72,911.13, 100,617.35 and 39,377.13

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Solution

The fourth proportional to 72,911.13, 100,617.35 and 39,377.13 is: 54,340.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,911.13 : 100,617.35 = 39,377.13 : x
  2. Step 2: Convert to fraction form
    72,911.13/100,617.35 = 39,377.13/x
  3. Step 3: Cross multiply
    72,911.13x = 100,617.35 × 39,377.13
  4. Step 4: Simplify right side
    72,911.13x = 3,962,022,471.21
  5. Step 5: Solve for x
    x = 3,962,022,471.21/72,911.13
  6. Step 6: Final answer
    x = 54,340.43

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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.