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Finding the Fourth Proportional to 100,853.51, 151,097.75 and 72,620.70

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Solution

The fourth proportional to 100,853.51, 151,097.75 and 72,620.70 is: 108,799.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,853.51 : 151,097.75 = 72,620.70 : x
  2. Step 2: Convert to fraction form
    100,853.51/151,097.75 = 72,620.70/x
  3. Step 3: Cross multiply
    100,853.51x = 151,097.75 × 72,620.70
  4. Step 4: Simplify right side
    100,853.51x = 10,972,824,974.45
  5. Step 5: Solve for x
    x = 10,972,824,974.45/100,853.51
  6. Step 6: Final answer
    x = 108,799.64

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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.