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Finding the Fourth Proportional to 137,239.72, 205,879.25 and 42,478.22

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Solution

The fourth proportional to 137,239.72, 205,879.25 and 42,478.22 is: 63,723.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,239.72 : 205,879.25 = 42,478.22 : x
  2. Step 2: Convert to fraction form
    137,239.72/205,879.25 = 42,478.22/x
  3. Step 3: Cross multiply
    137,239.72x = 205,879.25 × 42,478.22
  4. Step 4: Simplify right side
    137,239.72x = 8,745,384,695.83
  5. Step 5: Solve for x
    x = 8,745,384,695.83/137,239.72
  6. Step 6: Final answer
    x = 63,723.42

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1.5x scale

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.