Home / 240,138.40-360,207.60-90,412.28

Finding the Fourth Proportional to 240,138.40, 360,207.60 and 90,412.28

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Solution

The fourth proportional to 240,138.40, 360,207.60 and 90,412.28 is: 135,618.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,138.40 : 360,207.60 = 90,412.28 : x
  2. Step 2: Convert to fraction form
    240,138.40/360,207.60 = 90,412.28/x
  3. Step 3: Cross multiply
    240,138.40x = 360,207.60 × 90,412.28
  4. Step 4: Simplify right side
    240,138.40x = 32,567,190,389.33
  5. Step 5: Solve for x
    x = 32,567,190,389.33/240,138.40
  6. Step 6: Final answer
    x = 135,618.42

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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.