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Finding the Fourth Proportional to 125,628, 188,528.40 and 51,756

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Solution

The fourth proportional to 125,628, 188,528.40 and 51,756 is: 77,669.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,628 : 188,528.40 = 51,756 : x
  2. Step 2: Convert to fraction form
    125,628/188,528.40 = 51,756/x
  3. Step 3: Cross multiply
    125,628x = 188,528.40 × 51,756
  4. Step 4: Simplify right side
    125,628x = 9,757,475,870.40
  5. Step 5: Solve for x
    x = 9,757,475,870.40/125,628
  6. Step 6: Final answer
    x = 77,669.59

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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.