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Finding the Fourth Proportional to 135,081.78, 186,407.81 and 77,729.96

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Solution

The fourth proportional to 135,081.78, 186,407.81 and 77,729.96 is: 107,264.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,081.78 : 186,407.81 = 77,729.96 : x
  2. Step 2: Convert to fraction form
    135,081.78/186,407.81 = 77,729.96/x
  3. Step 3: Cross multiply
    135,081.78x = 186,407.81 × 77,729.96
  4. Step 4: Simplify right side
    135,081.78x = 14,489,470,877.27
  5. Step 5: Solve for x
    x = 14,489,470,877.27/135,081.78
  6. Step 6: Final answer
    x = 107,264.44

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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.