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Finding the Fourth Proportional to 189,406.68, 261,387.50 and 103,370.37

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Solution

The fourth proportional to 189,406.68, 261,387.50 and 103,370.37 is: 142,654.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,406.68 : 261,387.50 = 103,370.37 : x
  2. Step 2: Convert to fraction form
    189,406.68/261,387.50 = 103,370.37/x
  3. Step 3: Cross multiply
    189,406.68x = 261,387.50 × 103,370.37
  4. Step 4: Simplify right side
    189,406.68x = 27,019,722,071.52
  5. Step 5: Solve for x
    x = 27,019,722,071.52/189,406.68
  6. Step 6: Final answer
    x = 142,654.54

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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.