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Finding the Fourth Proportional to 125,987.67, 188,919.99 and 54,970.32

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Solution

The fourth proportional to 125,987.67, 188,919.99 and 54,970.32 is: 82,428.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,987.67 : 188,919.99 = 54,970.32 : x
  2. Step 2: Convert to fraction form
    125,987.67/188,919.99 = 54,970.32/x
  3. Step 3: Cross multiply
    125,987.67x = 188,919.99 × 54,970.32
  4. Step 4: Simplify right side
    125,987.67x = 10,384,992,304.70
  5. Step 5: Solve for x
    x = 10,384,992,304.70/125,987.67
  6. Step 6: Final answer
    x = 82,428.64

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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.