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Finding the Fourth Proportional to 70,388.60, 105,596.66 and 30,945.58

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Solution

The fourth proportional to 70,388.60, 105,596.66 and 30,945.58 is: 46,424.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,388.60 : 105,596.66 = 30,945.58 : x
  2. Step 2: Convert to fraction form
    70,388.60/105,596.66 = 30,945.58/x
  3. Step 3: Cross multiply
    70,388.60x = 105,596.66 × 30,945.58
  4. Step 4: Simplify right side
    70,388.60x = 3,267,749,703.14
  5. Step 5: Solve for x
    x = 3,267,749,703.14/70,388.60
  6. Step 6: Final answer
    x = 46,424.42

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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.