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Finding the Fourth Proportional to 189,321.50, 261,268.58 and 103,281.88

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Solution

The fourth proportional to 189,321.50, 261,268.58 and 103,281.88 is: 142,531.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,321.50 : 261,268.58 = 103,281.88 : x
  2. Step 2: Convert to fraction form
    189,321.50/261,268.58 = 103,281.88/x
  3. Step 3: Cross multiply
    189,321.50x = 261,268.58 × 103,281.88
  4. Step 4: Simplify right side
    189,321.50x = 26,984,310,127.33
  5. Step 5: Solve for x
    x = 26,984,310,127.33/189,321.50
  6. Step 6: Final answer
    x = 142,531.67

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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.