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Finding the Fourth Proportional to 70,997.28, 97,978.08 and 39,166.56

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Solution

The fourth proportional to 70,997.28, 97,978.08 and 39,166.56 is: 54,050.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,997.28 : 97,978.08 = 39,166.56 : x
  2. Step 2: Convert to fraction form
    70,997.28/97,978.08 = 39,166.56/x
  3. Step 3: Cross multiply
    70,997.28x = 97,978.08 × 39,166.56
  4. Step 4: Simplify right side
    70,997.28x = 3,837,464,349.00
  5. Step 5: Solve for x
    x = 3,837,464,349.00/70,997.28
  6. Step 6: Final answer
    x = 54,050.86

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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.