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Finding the Fourth Proportional to 125,895.90, 188,843.85 and 69,908.70

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Solution

The fourth proportional to 125,895.90, 188,843.85 and 69,908.70 is: 104,863.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,895.90 : 188,843.85 = 69,908.70 : x
  2. Step 2: Convert to fraction form
    125,895.90/188,843.85 = 69,908.70/x
  3. Step 3: Cross multiply
    125,895.90x = 188,843.85 × 69,908.70
  4. Step 4: Simplify right side
    125,895.90x = 13,201,828,056.50
  5. Step 5: Solve for x
    x = 13,201,828,056.50/125,895.90
  6. Step 6: Final answer
    x = 104,863.05

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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.