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Finding the Fourth Proportional to 129,709.39, 194,569.93 and 39,745.62

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Solution

The fourth proportional to 129,709.39, 194,569.93 and 39,745.62 is: 59,620.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,709.39 : 194,569.93 = 39,745.62 : x
  2. Step 2: Convert to fraction form
    129,709.39/194,569.93 = 39,745.62/x
  3. Step 3: Cross multiply
    129,709.39x = 194,569.93 × 39,745.62
  4. Step 4: Simplify right side
    129,709.39x = 7,733,302,501.21
  5. Step 5: Solve for x
    x = 7,733,302,501.21/129,709.39
  6. Step 6: Final answer
    x = 59,620.22

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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.