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Finding the Fourth Proportional to 100,895.64, 139,169.32 and 63,104.28

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Solution

The fourth proportional to 100,895.64, 139,169.32 and 63,104.28 is: 87,042.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,895.64 : 139,169.32 = 63,104.28 : x
  2. Step 2: Convert to fraction form
    100,895.64/139,169.32 = 63,104.28/x
  3. Step 3: Cross multiply
    100,895.64x = 139,169.32 × 63,104.28
  4. Step 4: Simplify right side
    100,895.64x = 8,782,179,736.69
  5. Step 5: Solve for x
    x = 8,782,179,736.69/100,895.64
  6. Step 6: Final answer
    x = 87,042.21

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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.