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Finding the Fourth Proportional to 57,068.50, 85,641.63 and 20,132.50

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Solution

The fourth proportional to 57,068.50, 85,641.63 and 20,132.50 is: 30,212.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,068.50 : 85,641.63 = 20,132.50 : x
  2. Step 2: Convert to fraction form
    57,068.50/85,641.63 = 20,132.50/x
  3. Step 3: Cross multiply
    57,068.50x = 85,641.63 × 20,132.50
  4. Step 4: Simplify right side
    57,068.50x = 1,724,180,115.98
  5. Step 5: Solve for x
    x = 1,724,180,115.98/57,068.50
  6. Step 6: Final answer
    x = 30,212.47

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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.