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Finding the Fourth Proportional to 90,450.80, 124,691 and 63,511.28

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Solution

The fourth proportional to 90,450.80, 124,691 and 63,511.28 is: 87,553.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,450.80 : 124,691 = 63,511.28 : x
  2. Step 2: Convert to fraction form
    90,450.80/124,691 = 63,511.28/x
  3. Step 3: Cross multiply
    90,450.80x = 124,691 × 63,511.28
  4. Step 4: Simplify right side
    90,450.80x = 7,919,285,014.48
  5. Step 5: Solve for x
    x = 7,919,285,014.48/90,450.80
  6. Step 6: Final answer
    x = 87,553.51

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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.