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Finding the Fourth Proportional to 135,489.60, 186,964.67 and 75,062.79

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Solution

The fourth proportional to 135,489.60, 186,964.67 and 75,062.79 is: 103,580.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,489.60 : 186,964.67 = 75,062.79 : x
  2. Step 2: Convert to fraction form
    135,489.60/186,964.67 = 75,062.79/x
  3. Step 3: Cross multiply
    135,489.60x = 186,964.67 × 75,062.79
  4. Step 4: Simplify right side
    135,489.60x = 14,034,089,761.63
  5. Step 5: Solve for x
    x = 14,034,089,761.63/135,489.60
  6. Step 6: Final answer
    x = 103,580.57

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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.