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Finding the Fourth Proportional to 135,314.58, 186,734.48 and 74,889.39

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Solution

The fourth proportional to 135,314.58, 186,734.48 and 74,889.39 is: 103,347.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,314.58 : 186,734.48 = 74,889.39 : x
  2. Step 2: Convert to fraction form
    135,314.58/186,734.48 = 74,889.39/x
  3. Step 3: Cross multiply
    135,314.58x = 186,734.48 × 74,889.39
  4. Step 4: Simplify right side
    135,314.58x = 13,984,430,924.72
  5. Step 5: Solve for x
    x = 13,984,430,924.72/135,314.58
  6. Step 6: Final answer
    x = 103,347.55

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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.