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Finding the Fourth Proportional to 67,048.40, 100,313.40 and 43,720.40

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Solution

The fourth proportional to 67,048.40, 100,313.40 and 43,720.40 is: 65,411.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,048.40 : 100,313.40 = 43,720.40 : x
  2. Step 2: Convert to fraction form
    67,048.40/100,313.40 = 43,720.40/x
  3. Step 3: Cross multiply
    67,048.40x = 100,313.40 × 43,720.40
  4. Step 4: Simplify right side
    67,048.40x = 4,385,741,973.36
  5. Step 5: Solve for x
    x = 4,385,741,973.36/67,048.40
  6. Step 6: Final answer
    x = 65,411.58

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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.