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Finding the Fourth Proportional to 125,631.80, 188,447.70 and 51,759.80

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Solution

The fourth proportional to 125,631.80, 188,447.70 and 51,759.80 is: 77,639.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,631.80 : 188,447.70 = 51,759.80 : x
  2. Step 2: Convert to fraction form
    125,631.80/188,447.70 = 51,759.80/x
  3. Step 3: Cross multiply
    125,631.80x = 188,447.70 × 51,759.80
  4. Step 4: Simplify right side
    125,631.80x = 9,754,015,262.46
  5. Step 5: Solve for x
    x = 9,754,015,262.46/125,631.80
  6. Step 6: Final answer
    x = 77,639.70

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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.