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Finding the Fourth Proportional to 104,365.36, 143,138.72 and 100,078.80

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Solution

The fourth proportional to 104,365.36, 143,138.72 and 100,078.80 is: 137,259.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,365.36 : 143,138.72 = 100,078.80 : x
  2. Step 2: Convert to fraction form
    104,365.36/143,138.72 = 100,078.80/x
  3. Step 3: Cross multiply
    104,365.36x = 143,138.72 × 100,078.80
  4. Step 4: Simplify right side
    104,365.36x = 14,325,151,331.14
  5. Step 5: Solve for x
    x = 14,325,151,331.14/104,365.36
  6. Step 6: Final answer
    x = 137,259.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.