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Finding the Fourth Proportional to 69,048.40, 103,313.40 and 45,720.40

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Solution

The fourth proportional to 69,048.40, 103,313.40 and 45,720.40 is: 68,408.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,048.40 : 103,313.40 = 45,720.40 : x
  2. Step 2: Convert to fraction form
    69,048.40/103,313.40 = 45,720.40/x
  3. Step 3: Cross multiply
    69,048.40x = 103,313.40 × 45,720.40
  4. Step 4: Simplify right side
    69,048.40x = 4,723,529,973.36
  5. Step 5: Solve for x
    x = 4,723,529,973.36/69,048.40
  6. Step 6: Final answer
    x = 68,408.97

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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.