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Finding the Fourth Proportional to 125,858, 188,787 and 51,987.92

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Solution

The fourth proportional to 125,858, 188,787 and 51,987.92 is: 77,981.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,858 : 188,787 = 51,987.92 : x
  2. Step 2: Convert to fraction form
    125,858/188,787 = 51,987.92/x
  3. Step 3: Cross multiply
    125,858x = 188,787 × 51,987.92
  4. Step 4: Simplify right side
    125,858x = 9,814,643,453.04
  5. Step 5: Solve for x
    x = 9,814,643,453.04/125,858
  6. Step 6: Final answer
    x = 77,981.88

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.