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Finding the Fourth Proportional to 105,883.20, 158,883.12 and 70,891.20

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Solution

The fourth proportional to 105,883.20, 158,883.12 and 70,891.20 is: 106,375.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,883.20 : 158,883.12 = 70,891.20 : x
  2. Step 2: Convert to fraction form
    105,883.20/158,883.12 = 70,891.20/x
  3. Step 3: Cross multiply
    105,883.20x = 158,883.12 × 70,891.20
  4. Step 4: Simplify right side
    105,883.20x = 11,263,415,036.54
  5. Step 5: Solve for x
    x = 11,263,415,036.54/105,883.20
  6. Step 6: Final answer
    x = 106,375.85

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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.