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Finding the Fourth Proportional to 56,620.82, 84,969.51 and 21,559.57

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Solution

The fourth proportional to 56,620.82, 84,969.51 and 21,559.57 is: 32,353.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,620.82 : 84,969.51 = 21,559.57 : x
  2. Step 2: Convert to fraction form
    56,620.82/84,969.51 = 21,559.57/x
  3. Step 3: Cross multiply
    56,620.82x = 84,969.51 × 21,559.57
  4. Step 4: Simplify right side
    56,620.82x = 1,831,905,805.44
  5. Step 5: Solve for x
    x = 1,831,905,805.44/56,620.82
  6. Step 6: Final answer
    x = 32,353.92

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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.