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Finding the Fourth Proportional to 99,571.59, 149,357.70 and 28,494.09

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Solution

The fourth proportional to 99,571.59, 149,357.70 and 28,494.09 is: 42,741.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,571.59 : 149,357.70 = 28,494.09 : x
  2. Step 2: Convert to fraction form
    99,571.59/149,357.70 = 28,494.09/x
  3. Step 3: Cross multiply
    99,571.59x = 149,357.70 × 28,494.09
  4. Step 4: Simplify right side
    99,571.59x = 4,255,811,745.99
  5. Step 5: Solve for x
    x = 4,255,811,745.99/99,571.59
  6. Step 6: Final answer
    x = 42,741.23

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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.