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Finding the Fourth Proportional to 70,958.95, 106,438.43 and 28,861.94

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Solution

The fourth proportional to 70,958.95, 106,438.43 and 28,861.94 is: 43,292.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,958.95 : 106,438.43 = 28,861.94 : x
  2. Step 2: Convert to fraction form
    70,958.95/106,438.43 = 28,861.94/x
  3. Step 3: Cross multiply
    70,958.95x = 106,438.43 × 28,861.94
  4. Step 4: Simplify right side
    70,958.95x = 3,072,019,319.89
  5. Step 5: Solve for x
    x = 3,072,019,319.89/70,958.95
  6. Step 6: Final answer
    x = 43,292.91

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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.