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Finding the Fourth Proportional to 145,704.15, 218,500.87 and 69,724.70

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Solution

The fourth proportional to 145,704.15, 218,500.87 and 69,724.70 is: 104,560.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,704.15 : 218,500.87 = 69,724.70 : x
  2. Step 2: Convert to fraction form
    145,704.15/218,500.87 = 69,724.70/x
  3. Step 3: Cross multiply
    145,704.15x = 218,500.87 × 69,724.70
  4. Step 4: Simplify right side
    145,704.15x = 15,234,907,610.49
  5. Step 5: Solve for x
    x = 15,234,907,610.49/145,704.15
  6. Step 6: Final answer
    x = 104,560.56

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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.