Home / 135,081.21-186,406.80-77,739

Finding the Fourth Proportional to 135,081.21, 186,406.80 and 77,739

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Solution

The fourth proportional to 135,081.21, 186,406.80 and 77,739 is: 107,276.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,081.21 : 186,406.80 = 77,739 : x
  2. Step 2: Convert to fraction form
    135,081.21/186,406.80 = 77,739/x
  3. Step 3: Cross multiply
    135,081.21x = 186,406.80 × 77,739
  4. Step 4: Simplify right side
    135,081.21x = 14,491,078,225.20
  5. Step 5: Solve for x
    x = 14,491,078,225.20/135,081.21
  6. Step 6: Final answer
    x = 107,276.79

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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.