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Finding the Fourth Proportional to 125,406.54, 188,102.72 and 91,707.03

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Solution

The fourth proportional to 125,406.54, 188,102.72 and 91,707.03 is: 137,555.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,406.54 : 188,102.72 = 91,707.03 : x
  2. Step 2: Convert to fraction form
    125,406.54/188,102.72 = 91,707.03/x
  3. Step 3: Cross multiply
    125,406.54x = 188,102.72 × 91,707.03
  4. Step 4: Simplify right side
    125,406.54x = 17,250,342,015.39
  5. Step 5: Solve for x
    x = 17,250,342,015.39/125,406.54
  6. Step 6: Final answer
    x = 137,555.36

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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.