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Finding the Fourth Proportional to 70,436.81, 105,667.51 and 30,992.90

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Solution

The fourth proportional to 70,436.81, 105,667.51 and 30,992.90 is: 46,494.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,436.81 : 105,667.51 = 30,992.90 : x
  2. Step 2: Convert to fraction form
    70,436.81/105,667.51 = 30,992.90/x
  3. Step 3: Cross multiply
    70,436.81x = 105,667.51 × 30,992.90
  4. Step 4: Simplify right side
    70,436.81x = 3,274,942,110.14
  5. Step 5: Solve for x
    x = 3,274,942,110.14/70,436.81
  6. Step 6: Final answer
    x = 46,494.76

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1.5x scale

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.