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Finding the Fourth Proportional to 48,742.70, 73,114.05 and 21,040.70

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Solution

The fourth proportional to 48,742.70, 73,114.05 and 21,040.70 is: 31,561.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,742.70 : 73,114.05 = 21,040.70 : x
  2. Step 2: Convert to fraction form
    48,742.70/73,114.05 = 21,040.70/x
  3. Step 3: Cross multiply
    48,742.70x = 73,114.05 × 21,040.70
  4. Step 4: Simplify right side
    48,742.70x = 1,538,370,791.84
  5. Step 5: Solve for x
    x = 1,538,370,791.84/48,742.70
  6. Step 6: Final answer
    x = 31,561.05

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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.