Home / 56,072.12-77,378.10-30,920

Finding the Fourth Proportional to 56,072.12, 77,378.10 and 30,920

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Solution

The fourth proportional to 56,072.12, 77,378.10 and 30,920 is: 42,668.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,072.12 : 77,378.10 = 30,920 : x
  2. Step 2: Convert to fraction form
    56,072.12/77,378.10 = 30,920/x
  3. Step 3: Cross multiply
    56,072.12x = 77,378.10 × 30,920
  4. Step 4: Simplify right side
    56,072.12x = 2,392,530,852
  5. Step 5: Solve for x
    x = 2,392,530,852/56,072.12
  6. Step 6: Final answer
    x = 42,668.81

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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.