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Finding the Fourth Proportional to 125,903.40, 188,855.10 and 69,916.20

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Solution

The fourth proportional to 125,903.40, 188,855.10 and 69,916.20 is: 104,874.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,903.40 : 188,855.10 = 69,916.20 : x
  2. Step 2: Convert to fraction form
    125,903.40/188,855.10 = 69,916.20/x
  3. Step 3: Cross multiply
    125,903.40x = 188,855.10 × 69,916.20
  4. Step 4: Simplify right side
    125,903.40x = 13,204,030,942.62
  5. Step 5: Solve for x
    x = 13,204,030,942.62/125,903.40
  6. Step 6: Final answer
    x = 104,874.30

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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.