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Finding the Fourth Proportional to 145,859.88, 218,716.90 and 66,906.76

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Solution

The fourth proportional to 145,859.88, 218,716.90 and 66,906.76 is: 100,326.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,859.88 : 218,716.90 = 66,906.76 : x
  2. Step 2: Convert to fraction form
    145,859.88/218,716.90 = 66,906.76/x
  3. Step 3: Cross multiply
    145,859.88x = 218,716.90 × 66,906.76
  4. Step 4: Simplify right side
    145,859.88x = 14,633,639,136.24
  5. Step 5: Solve for x
    x = 14,633,639,136.24/145,859.88
  6. Step 6: Final answer
    x = 100,326.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.