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Finding the Fourth Proportional to 131,726.80, 197,129.40 and 120,667.60

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Solution

The fourth proportional to 131,726.80, 197,129.40 and 120,667.60 is: 180,579.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,726.80 : 197,129.40 = 120,667.60 : x
  2. Step 2: Convert to fraction form
    131,726.80/197,129.40 = 120,667.60/x
  3. Step 3: Cross multiply
    131,726.80x = 197,129.40 × 120,667.60
  4. Step 4: Simplify right side
    131,726.80x = 23,787,131,587.44
  5. Step 5: Solve for x
    x = 23,787,131,587.44/131,726.80
  6. Step 6: Final answer
    x = 180,579.29

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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.