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Finding the Fourth Proportional to 101,105.85, 139,525.68 and 55,786.65

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Solution

The fourth proportional to 101,105.85, 139,525.68 and 55,786.65 is: 76,985.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,105.85 : 139,525.68 = 55,786.65 : x
  2. Step 2: Convert to fraction form
    101,105.85/139,525.68 = 55,786.65/x
  3. Step 3: Cross multiply
    101,105.85x = 139,525.68 × 55,786.65
  4. Step 4: Simplify right side
    101,105.85x = 7,783,670,276.17
  5. Step 5: Solve for x
    x = 7,783,670,276.17/101,105.85
  6. Step 6: Final answer
    x = 76,985.36

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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.