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Finding the Fourth Proportional to 101,928.32, 140,662.72 and 57,215.36

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Solution

The fourth proportional to 101,928.32, 140,662.72 and 57,215.36 is: 78,958.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,928.32 : 140,662.72 = 57,215.36 : x
  2. Step 2: Convert to fraction form
    101,928.32/140,662.72 = 57,215.36/x
  3. Step 3: Cross multiply
    101,928.32x = 140,662.72 × 57,215.36
  4. Step 4: Simplify right side
    101,928.32x = 8,048,068,163.38
  5. Step 5: Solve for x
    x = 8,048,068,163.38/101,928.32
  6. Step 6: Final answer
    x = 78,958.12

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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.