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Finding the Fourth Proportional to 69,025.80, 103,538.70 and 60,715.20

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Solution

The fourth proportional to 69,025.80, 103,538.70 and 60,715.20 is: 91,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,025.80 : 103,538.70 = 60,715.20 : x
  2. Step 2: Convert to fraction form
    69,025.80/103,538.70 = 60,715.20/x
  3. Step 3: Cross multiply
    69,025.80x = 103,538.70 × 60,715.20
  4. Step 4: Simplify right side
    69,025.80x = 6,286,372,878.24
  5. Step 5: Solve for x
    x = 6,286,372,878.24/69,025.80
  6. Step 6: Final answer
    x = 91,072.80

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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.