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Finding the Fourth Proportional to 70,481.60, 105,722.40 and 53,892.80

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Solution

The fourth proportional to 70,481.60, 105,722.40 and 53,892.80 is: 80,839.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,481.60 : 105,722.40 = 53,892.80 : x
  2. Step 2: Convert to fraction form
    70,481.60/105,722.40 = 53,892.80/x
  3. Step 3: Cross multiply
    70,481.60x = 105,722.40 × 53,892.80
  4. Step 4: Simplify right side
    70,481.60x = 5,697,676,158.72
  5. Step 5: Solve for x
    x = 5,697,676,158.72/70,481.60
  6. Step 6: Final answer
    x = 80,839.20

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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.