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Finding the Fourth Proportional to 101,080.53, 139,489.40 and 55,762.86

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Solution

The fourth proportional to 101,080.53, 139,489.40 and 55,762.86 is: 76,951.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,080.53 : 139,489.40 = 55,762.86 : x
  2. Step 2: Convert to fraction form
    101,080.53/139,489.40 = 55,762.86/x
  3. Step 3: Cross multiply
    101,080.53x = 139,489.40 × 55,762.86
  4. Step 4: Simplify right side
    101,080.53x = 7,778,327,447.65
  5. Step 5: Solve for x
    x = 7,778,327,447.65/101,080.53
  6. Step 6: Final answer
    x = 76,951.79

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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.