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Finding the Fourth Proportional to 70,238.56, 105,368.32 and 25,861.90

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Solution

The fourth proportional to 70,238.56, 105,368.32 and 25,861.90 is: 38,796.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,238.56 : 105,368.32 = 25,861.90 : x
  2. Step 2: Convert to fraction form
    70,238.56/105,368.32 = 25,861.90/x
  3. Step 3: Cross multiply
    70,238.56x = 105,368.32 × 25,861.90
  4. Step 4: Simplify right side
    70,238.56x = 2,725,024,955.01
  5. Step 5: Solve for x
    x = 2,725,024,955.01/70,238.56
  6. Step 6: Final answer
    x = 38,796.71

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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.