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Finding the Fourth Proportional to 71,570.72, 98,765.76 and 39,738.56

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Solution

The fourth proportional to 71,570.72, 98,765.76 and 39,738.56 is: 54,838.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,570.72 : 98,765.76 = 39,738.56 : x
  2. Step 2: Convert to fraction form
    71,570.72/98,765.76 = 39,738.56/x
  3. Step 3: Cross multiply
    71,570.72x = 98,765.76 × 39,738.56
  4. Step 4: Simplify right side
    71,570.72x = 3,924,809,079.71
  5. Step 5: Solve for x
    x = 3,924,809,079.71/71,570.72
  6. Step 6: Final answer
    x = 54,838.19

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