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Finding the Fourth Proportional to 100,372.44, 138,509.28 and 57,944.64

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Solution

The fourth proportional to 100,372.44, 138,509.28 and 57,944.64 is: 79,960.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,372.44 : 138,509.28 = 57,944.64 : x
  2. Step 2: Convert to fraction form
    100,372.44/138,509.28 = 57,944.64/x
  3. Step 3: Cross multiply
    100,372.44x = 138,509.28 × 57,944.64
  4. Step 4: Simplify right side
    100,372.44x = 8,025,870,366.26
  5. Step 5: Solve for x
    x = 8,025,870,366.26/100,372.44
  6. Step 6: Final answer
    x = 79,960.90

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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.