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Finding the Fourth Proportional to 48,741.70, 73,112.55 and 21,039.70

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Solution

The fourth proportional to 48,741.70, 73,112.55 and 21,039.70 is: 31,559.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,741.70 : 73,112.55 = 21,039.70 : x
  2. Step 2: Convert to fraction form
    48,741.70/73,112.55 = 21,039.70/x
  3. Step 3: Cross multiply
    48,741.70x = 73,112.55 × 21,039.70
  4. Step 4: Simplify right side
    48,741.70x = 1,538,266,118.24
  5. Step 5: Solve for x
    x = 1,538,266,118.24/48,741.70
  6. Step 6: Final answer
    x = 31,559.55

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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.