Home / 135,148.72-186,489.12-74,711.20

Finding the Fourth Proportional to 135,148.72, 186,489.12 and 74,711.20

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Solution

The fourth proportional to 135,148.72, 186,489.12 and 74,711.20 is: 103,092.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,148.72 : 186,489.12 = 74,711.20 : x
  2. Step 2: Convert to fraction form
    135,148.72/186,489.12 = 74,711.20/x
  3. Step 3: Cross multiply
    135,148.72x = 186,489.12 × 74,711.20
  4. Step 4: Simplify right side
    135,148.72x = 13,932,825,942.14
  5. Step 5: Solve for x
    x = 13,932,825,942.14/135,148.72
  6. Step 6: Final answer
    x = 103,092.55

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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.