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Finding the Fourth Proportional to 110,619.70, 165,929.55 and 90,936.70

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Solution

The fourth proportional to 110,619.70, 165,929.55 and 90,936.70 is: 136,405.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,619.70 : 165,929.55 = 90,936.70 : x
  2. Step 2: Convert to fraction form
    110,619.70/165,929.55 = 90,936.70/x
  3. Step 3: Cross multiply
    110,619.70x = 165,929.55 × 90,936.70
  4. Step 4: Simplify right side
    110,619.70x = 15,089,085,709.49
  5. Step 5: Solve for x
    x = 15,089,085,709.49/110,619.70
  6. Step 6: Final answer
    x = 136,405.05

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1.5x scale

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.