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Finding the Fourth Proportional to 70,420.85, 105,576.43 and 34,857.62

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Solution

The fourth proportional to 70,420.85, 105,576.43 and 34,857.62 is: 52,259.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,420.85 : 105,576.43 = 34,857.62 : x
  2. Step 2: Convert to fraction form
    70,420.85/105,576.43 = 34,857.62/x
  3. Step 3: Cross multiply
    70,420.85x = 105,576.43 × 34,857.62
  4. Step 4: Simplify right side
    70,420.85x = 3,680,143,077.90
  5. Step 5: Solve for x
    x = 3,680,143,077.90/70,420.85
  6. Step 6: Final answer
    x = 52,259.28

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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.