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Finding the Fourth Proportional to 129,971.20, 194,859.60 and 70,873.60

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Solution

The fourth proportional to 129,971.20, 194,859.60 and 70,873.60 is: 106,257.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,971.20 : 194,859.60 = 70,873.60 : x
  2. Step 2: Convert to fraction form
    129,971.20/194,859.60 = 70,873.60/x
  3. Step 3: Cross multiply
    129,971.20x = 194,859.60 × 70,873.60
  4. Step 4: Simplify right side
    129,971.20x = 13,810,401,346.56
  5. Step 5: Solve for x
    x = 13,810,401,346.56/129,971.20
  6. Step 6: Final answer
    x = 106,257.40

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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.