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Finding the Fourth Proportional to 201,447.20, 302,170.80 and 131,405.60

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Solution

The fourth proportional to 201,447.20, 302,170.80 and 131,405.60 is: 197,108.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,447.20 : 302,170.80 = 131,405.60 : x
  2. Step 2: Convert to fraction form
    201,447.20/302,170.80 = 131,405.60/x
  3. Step 3: Cross multiply
    201,447.20x = 302,170.80 × 131,405.60
  4. Step 4: Simplify right side
    201,447.20x = 39,706,935,276.48
  5. Step 5: Solve for x
    x = 39,706,935,276.48/201,447.20
  6. Step 6: Final answer
    x = 197,108.40

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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.