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Finding the Fourth Proportional to 135,351.48, 186,782.78 and 74,920.82

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Solution

The fourth proportional to 135,351.48, 186,782.78 and 74,920.82 is: 103,389.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,351.48 : 186,782.78 = 74,920.82 : x
  2. Step 2: Convert to fraction form
    135,351.48/186,782.78 = 74,920.82/x
  3. Step 3: Cross multiply
    135,351.48x = 186,782.78 × 74,920.82
  4. Step 4: Simplify right side
    135,351.48x = 13,993,919,447.42
  5. Step 5: Solve for x
    x = 13,993,919,447.42/135,351.48
  6. Step 6: Final answer
    x = 103,389.48

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1.5x scale

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.