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Finding the Fourth Proportional to 42,641.98, 63,879.86 and 25,960.64

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Solution

The fourth proportional to 42,641.98, 63,879.86 and 25,960.64 is: 38,890.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,641.98 : 63,879.86 = 25,960.64 : x
  2. Step 2: Convert to fraction form
    42,641.98/63,879.86 = 25,960.64/x
  3. Step 3: Cross multiply
    42,641.98x = 63,879.86 × 25,960.64
  4. Step 4: Simplify right side
    42,641.98x = 1,658,361,918.91
  5. Step 5: Solve for x
    x = 1,658,361,918.91/42,641.98
  6. Step 6: Final answer
    x = 38,890.36

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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.