Home / 189,722.15-261,820.02-103,684.78

Finding the Fourth Proportional to 189,722.15, 261,820.02 and 103,684.78

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Solution

The fourth proportional to 189,722.15, 261,820.02 and 103,684.78 is: 143,086.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,722.15 : 261,820.02 = 103,684.78 : x
  2. Step 2: Convert to fraction form
    189,722.15/261,820.02 = 103,684.78/x
  3. Step 3: Cross multiply
    189,722.15x = 261,820.02 × 103,684.78
  4. Step 4: Simplify right side
    189,722.15x = 27,146,751,173.30
  5. Step 5: Solve for x
    x = 27,146,751,173.30/189,722.15
  6. Step 6: Final answer
    x = 143,086.88

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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.