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Finding the Fourth Proportional to 72,214.40, 108,102.90 and 54,572.60

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Solution

The fourth proportional to 72,214.40, 108,102.90 and 54,572.60 is: 81,693.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,214.40 : 108,102.90 = 54,572.60 : x
  2. Step 2: Convert to fraction form
    72,214.40/108,102.90 = 54,572.60/x
  3. Step 3: Cross multiply
    72,214.40x = 108,102.90 × 54,572.60
  4. Step 4: Simplify right side
    72,214.40x = 5,899,456,320.54
  5. Step 5: Solve for x
    x = 5,899,456,320.54/72,214.40
  6. Step 6: Final answer
    x = 81,693.63

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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.