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Finding the Fourth Proportional to 70,401.86, 105,340.32 and 69,614.54

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Solution

The fourth proportional to 70,401.86, 105,340.32 and 69,614.54 is: 104,162.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,401.86 : 105,340.32 = 69,614.54 : x
  2. Step 2: Convert to fraction form
    70,401.86/105,340.32 = 69,614.54/x
  3. Step 3: Cross multiply
    70,401.86x = 105,340.32 × 69,614.54
  4. Step 4: Simplify right side
    70,401.86x = 7,333,217,920.25
  5. Step 5: Solve for x
    x = 7,333,217,920.25/70,401.86
  6. Step 6: Final answer
    x = 104,162.28

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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.