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Finding the Fourth Proportional to 72,571.43, 100,131.05 and 42,339.50

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Solution

The fourth proportional to 72,571.43, 100,131.05 and 42,339.50 is: 58,418.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,571.43 : 100,131.05 = 42,339.50 : x
  2. Step 2: Convert to fraction form
    72,571.43/100,131.05 = 42,339.50/x
  3. Step 3: Cross multiply
    72,571.43x = 100,131.05 × 42,339.50
  4. Step 4: Simplify right side
    72,571.43x = 4,239,498,591.48
  5. Step 5: Solve for x
    x = 4,239,498,591.48/72,571.43
  6. Step 6: Final answer
    x = 58,418.29

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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.