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Finding the Fourth Proportional to 60,645.70, 90,972.60 and 20,664.10

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Solution

The fourth proportional to 60,645.70, 90,972.60 and 20,664.10 is: 30,997.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,645.70 : 90,972.60 = 20,664.10 : x
  2. Step 2: Convert to fraction form
    60,645.70/90,972.60 = 20,664.10/x
  3. Step 3: Cross multiply
    60,645.70x = 90,972.60 × 20,664.10
  4. Step 4: Simplify right side
    60,645.70x = 1,879,866,903.66
  5. Step 5: Solve for x
    x = 1,879,866,903.66/60,645.70
  6. Step 6: Final answer
    x = 30,997.53

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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.