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Finding the Fourth Proportional to 240,138.93, 360,208.39 and 90,412.81

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Solution

The fourth proportional to 240,138.93, 360,208.39 and 90,412.81 is: 135,619.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,138.93 : 360,208.39 = 90,412.81 : x
  2. Step 2: Convert to fraction form
    240,138.93/360,208.39 = 90,412.81/x
  3. Step 3: Cross multiply
    240,138.93x = 360,208.39 × 90,412.81
  4. Step 4: Simplify right side
    240,138.93x = 32,567,452,022.73
  5. Step 5: Solve for x
    x = 32,567,452,022.73/240,138.93
  6. Step 6: Final answer
    x = 135,619.21

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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.