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Finding the Fourth Proportional to 103,879.67, 143,321.99 and 63,551.39

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Solution

The fourth proportional to 103,879.67, 143,321.99 and 63,551.39 is: 87,681.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,879.67 : 143,321.99 = 63,551.39 : x
  2. Step 2: Convert to fraction form
    103,879.67/143,321.99 = 63,551.39/x
  3. Step 3: Cross multiply
    103,879.67x = 143,321.99 × 63,551.39
  4. Step 4: Simplify right side
    103,879.67x = 9,108,310,647.70
  5. Step 5: Solve for x
    x = 9,108,310,647.70/103,879.67
  6. Step 6: Final answer
    x = 87,681.36

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1.5x scale

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.