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Finding the Fourth Proportional to 100,267.94, 138,317.99 and 67,991.65

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Solution

The fourth proportional to 100,267.94, 138,317.99 and 67,991.65 is: 93,793.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,267.94 : 138,317.99 = 67,991.65 : x
  2. Step 2: Convert to fraction form
    100,267.94/138,317.99 = 67,991.65/x
  3. Step 3: Cross multiply
    100,267.94x = 138,317.99 × 67,991.65
  4. Step 4: Simplify right side
    100,267.94x = 9,404,467,679.03
  5. Step 5: Solve for x
    x = 9,404,467,679.03/100,267.94
  6. Step 6: Final answer
    x = 93,793.36

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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.