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Finding the Fourth Proportional to 72,561.92, 100,138.08 and 42,366.56

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Solution

The fourth proportional to 72,561.92, 100,138.08 and 42,366.56 is: 58,467.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,561.92 : 100,138.08 = 42,366.56 : x
  2. Step 2: Convert to fraction form
    72,561.92/100,138.08 = 42,366.56/x
  3. Step 3: Cross multiply
    72,561.92x = 100,138.08 × 42,366.56
  4. Step 4: Simplify right side
    72,561.92x = 4,242,505,974.60
  5. Step 5: Solve for x
    x = 4,242,505,974.60/72,561.92
  6. Step 6: Final answer
    x = 58,467.39

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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.