Home / 129,640.19-194,488.82-39,683.61

Finding the Fourth Proportional to 129,640.19, 194,488.82 and 39,683.61

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Solution

The fourth proportional to 129,640.19, 194,488.82 and 39,683.61 is: 59,534.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,640.19 : 194,488.82 = 39,683.61 : x
  2. Step 2: Convert to fraction form
    129,640.19/194,488.82 = 39,683.61/x
  3. Step 3: Cross multiply
    129,640.19x = 194,488.82 × 39,683.61
  4. Step 4: Simplify right side
    129,640.19x = 7,718,018,283.82
  5. Step 5: Solve for x
    x = 7,718,018,283.82/129,640.19
  6. Step 6: Final answer
    x = 59,534.15

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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.