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Finding the Fourth Proportional to 60,147.22, 90,219.90 and 20,704.68

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Solution

The fourth proportional to 60,147.22, 90,219.90 and 20,704.68 is: 31,056.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,147.22 : 90,219.90 = 20,704.68 : x
  2. Step 2: Convert to fraction form
    60,147.22/90,219.90 = 20,704.68/x
  3. Step 3: Cross multiply
    60,147.22x = 90,219.90 × 20,704.68
  4. Step 4: Simplify right side
    60,147.22x = 1,867,974,159.13
  5. Step 5: Solve for x
    x = 1,867,974,159.13/60,147.22
  6. Step 6: Final answer
    x = 31,056.70

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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.