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Finding the Fourth Proportional to 70,589.40, 105,927.96 and 43,987.60

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Solution

The fourth proportional to 70,589.40, 105,927.96 and 43,987.60 is: 66,008.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,589.40 : 105,927.96 = 43,987.60 : x
  2. Step 2: Convert to fraction form
    70,589.40/105,927.96 = 43,987.60/x
  3. Step 3: Cross multiply
    70,589.40x = 105,927.96 × 43,987.60
  4. Step 4: Simplify right side
    70,589.40x = 4,659,516,733.30
  5. Step 5: Solve for x
    x = 4,659,516,733.30/70,589.40
  6. Step 6: Final answer
    x = 66,008.73

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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.