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Finding the Fourth Proportional to 220,467.78, 330,538.86 and 70,621.38

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Solution

The fourth proportional to 220,467.78, 330,538.86 and 70,621.38 is: 105,879.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,467.78 : 330,538.86 = 70,621.38 : x
  2. Step 2: Convert to fraction form
    220,467.78/330,538.86 = 70,621.38/x
  3. Step 3: Cross multiply
    220,467.78x = 330,538.86 × 70,621.38
  4. Step 4: Simplify right side
    220,467.78x = 23,343,110,436.83
  5. Step 5: Solve for x
    x = 23,343,110,436.83/220,467.78
  6. Step 6: Final answer
    x = 105,879.92

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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.