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Finding the Fourth Proportional to 70,912.65, 97,861.50 and 39,083.60

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Solution

The fourth proportional to 70,912.65, 97,861.50 and 39,083.60 is: 53,936.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,912.65 : 97,861.50 = 39,083.60 : x
  2. Step 2: Convert to fraction form
    70,912.65/97,861.50 = 39,083.60/x
  3. Step 3: Cross multiply
    70,912.65x = 97,861.50 × 39,083.60
  4. Step 4: Simplify right side
    70,912.65x = 3,824,779,232.09
  5. Step 5: Solve for x
    x = 3,824,779,232.09/70,912.65
  6. Step 6: Final answer
    x = 53,936.49

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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.