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Finding the Fourth Proportional to 131,431.80, 197,147.70 and 100,327.80

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Solution

The fourth proportional to 131,431.80, 197,147.70 and 100,327.80 is: 150,491.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,431.80 : 197,147.70 = 100,327.80 : x
  2. Step 2: Convert to fraction form
    131,431.80/197,147.70 = 100,327.80/x
  3. Step 3: Cross multiply
    131,431.80x = 197,147.70 × 100,327.80
  4. Step 4: Simplify right side
    131,431.80x = 19,779,395,016.06
  5. Step 5: Solve for x
    x = 19,779,395,016.06/131,431.80
  6. Step 6: Final answer
    x = 150,491.70

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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.