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Finding the Fourth Proportional to 131,071.20, 196,606.80 and 120,933.60

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Solution

The fourth proportional to 131,071.20, 196,606.80 and 120,933.60 is: 181,400.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,071.20 : 196,606.80 = 120,933.60 : x
  2. Step 2: Convert to fraction form
    131,071.20/196,606.80 = 120,933.60/x
  3. Step 3: Cross multiply
    131,071.20x = 196,606.80 × 120,933.60
  4. Step 4: Simplify right side
    131,071.20x = 23,776,368,108.48
  5. Step 5: Solve for x
    x = 23,776,368,108.48/131,071.20
  6. Step 6: Final answer
    x = 181,400.40

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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.