Home / 105,241.92-145,190.82-77,712.54

Finding the Fourth Proportional to 105,241.92, 145,190.82 and 77,712.54

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Solution

The fourth proportional to 105,241.92, 145,190.82 and 77,712.54 is: 107,211.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,241.92 : 145,190.82 = 77,712.54 : x
  2. Step 2: Convert to fraction form
    105,241.92/145,190.82 = 77,712.54/x
  3. Step 3: Cross multiply
    105,241.92x = 145,190.82 × 77,712.54
  4. Step 4: Simplify right side
    105,241.92x = 11,283,147,406.88
  5. Step 5: Solve for x
    x = 11,283,147,406.88/105,241.92
  6. Step 6: Final answer
    x = 107,211.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.