Home / 52,085.04-78,138.36-20,922.72

Finding the Fourth Proportional to 52,085.04, 78,138.36 and 20,922.72

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Solution

The fourth proportional to 52,085.04, 78,138.36 and 20,922.72 is: 31,388.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,085.04 : 78,138.36 = 20,922.72 : x
  2. Step 2: Convert to fraction form
    52,085.04/78,138.36 = 20,922.72/x
  3. Step 3: Cross multiply
    52,085.04x = 78,138.36 × 20,922.72
  4. Step 4: Simplify right side
    52,085.04x = 1,634,867,027.54
  5. Step 5: Solve for x
    x = 1,634,867,027.54/52,085.04
  6. Step 6: Final answer
    x = 31,388.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.