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Finding the Fourth Proportional to 109,407.99, 150,908.07 and 66,987.48

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Solution

The fourth proportional to 109,407.99, 150,908.07 and 66,987.48 is: 92,396.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,407.99 : 150,908.07 = 66,987.48 : x
  2. Step 2: Convert to fraction form
    109,407.99/150,908.07 = 66,987.48/x
  3. Step 3: Cross multiply
    109,407.99x = 150,908.07 × 66,987.48
  4. Step 4: Simplify right side
    109,407.99x = 10,108,951,320.96
  5. Step 5: Solve for x
    x = 10,108,951,320.96/109,407.99
  6. Step 6: Final answer
    x = 92,396.83

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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.