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Finding the Fourth Proportional to 70,295.28, 105,455.22 and 45,359.38

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Solution

The fourth proportional to 70,295.28, 105,455.22 and 45,359.38 is: 68,047.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,295.28 : 105,455.22 = 45,359.38 : x
  2. Step 2: Convert to fraction form
    70,295.28/105,455.22 = 45,359.38/x
  3. Step 3: Cross multiply
    70,295.28x = 105,455.22 × 45,359.38
  4. Step 4: Simplify right side
    70,295.28x = 4,783,383,396.96
  5. Step 5: Solve for x
    x = 4,783,383,396.96/70,295.28
  6. Step 6: Final answer
    x = 68,047.01

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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.