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Finding the Fourth Proportional to 70,978.44, 97,239.39 and 68,319.48

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Solution

The fourth proportional to 70,978.44, 97,239.39 and 68,319.48 is: 93,596.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,978.44 : 97,239.39 = 68,319.48 : x
  2. Step 2: Convert to fraction form
    70,978.44/97,239.39 = 68,319.48/x
  3. Step 3: Cross multiply
    70,978.44x = 97,239.39 × 68,319.48
  4. Step 4: Simplify right side
    70,978.44x = 6,643,344,560.32
  5. Step 5: Solve for x
    x = 6,643,344,560.32/70,978.44
  6. Step 6: Final answer
    x = 93,596.65

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.