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Finding the Fourth Proportional to 189,505.26, 261,515.65 and 104,620.50

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Solution

The fourth proportional to 189,505.26, 261,515.65 and 104,620.50 is: 144,375.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,505.26 : 261,515.65 = 104,620.50 : x
  2. Step 2: Convert to fraction form
    189,505.26/261,515.65 = 104,620.50/x
  3. Step 3: Cross multiply
    189,505.26x = 261,515.65 × 104,620.50
  4. Step 4: Simplify right side
    189,505.26x = 27,359,898,060.83
  5. Step 5: Solve for x
    x = 27,359,898,060.83/189,505.26
  6. Step 6: Final answer
    x = 144,375.40

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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.