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Finding the Fourth Proportional to 101,958.88, 140,698.50 and 56,639.80

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Solution

The fourth proportional to 101,958.88, 140,698.50 and 56,639.80 is: 78,160.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,958.88 : 140,698.50 = 56,639.80 : x
  2. Step 2: Convert to fraction form
    101,958.88/140,698.50 = 56,639.80/x
  3. Step 3: Cross multiply
    101,958.88x = 140,698.50 × 56,639.80
  4. Step 4: Simplify right side
    101,958.88x = 7,969,134,900.30
  5. Step 5: Solve for x
    x = 7,969,134,900.30/101,958.88
  6. Step 6: Final answer
    x = 78,160.28

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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.