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Finding the Fourth Proportional to 125,594.40, 188,136.45 and 78,063.60

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Solution

The fourth proportional to 125,594.40, 188,136.45 and 78,063.60 is: 116,936.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,594.40 : 188,136.45 = 78,063.60 : x
  2. Step 2: Convert to fraction form
    125,594.40/188,136.45 = 78,063.60/x
  3. Step 3: Cross multiply
    125,594.40x = 188,136.45 × 78,063.60
  4. Step 4: Simplify right side
    125,594.40x = 14,686,608,578.22
  5. Step 5: Solve for x
    x = 14,686,608,578.22/125,594.40
  6. Step 6: Final answer
    x = 116,936.81

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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.