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Finding the Fourth Proportional to 101,958.44, 140,698.08 and 56,639.57

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Solution

The fourth proportional to 101,958.44, 140,698.08 and 56,639.57 is: 78,160.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,958.44 : 140,698.08 = 56,639.57 : x
  2. Step 2: Convert to fraction form
    101,958.44/140,698.08 = 56,639.57/x
  3. Step 3: Cross multiply
    101,958.44x = 140,698.08 × 56,639.57
  4. Step 4: Simplify right side
    101,958.44x = 7,969,078,047.54
  5. Step 5: Solve for x
    x = 7,969,078,047.54/101,958.44
  6. Step 6: Final answer
    x = 78,160.07

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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.