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Finding the Fourth Proportional to 135,228.96, 186,608.88 and 74,798.64

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Solution

The fourth proportional to 135,228.96, 186,608.88 and 74,798.64 is: 103,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,228.96 : 186,608.88 = 74,798.64 : x
  2. Step 2: Convert to fraction form
    135,228.96/186,608.88 = 74,798.64/x
  3. Step 3: Cross multiply
    135,228.96x = 186,608.88 × 74,798.64
  4. Step 4: Simplify right side
    135,228.96x = 13,958,090,435.92
  5. Step 5: Solve for x
    x = 13,958,090,435.92/135,228.96
  6. Step 6: Final answer
    x = 103,218.20

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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.