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Finding the Fourth Proportional to 131,503.20, 197,157.60 and 72,405.60

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Solution

The fourth proportional to 131,503.20, 197,157.60 and 72,405.60 is: 108,554.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,503.20 : 197,157.60 = 72,405.60 : x
  2. Step 2: Convert to fraction form
    131,503.20/197,157.60 = 72,405.60/x
  3. Step 3: Cross multiply
    131,503.20x = 197,157.60 × 72,405.60
  4. Step 4: Simplify right side
    131,503.20x = 14,275,314,322.56
  5. Step 5: Solve for x
    x = 14,275,314,322.56/131,503.20
  6. Step 6: Final answer
    x = 108,554.88

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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.