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Finding the Fourth Proportional to 70,739.68, 97,620.56 and 38,908.96

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Solution

The fourth proportional to 70,739.68, 97,620.56 and 38,908.96 is: 53,694.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,739.68 : 97,620.56 = 38,908.96 : x
  2. Step 2: Convert to fraction form
    70,739.68/97,620.56 = 38,908.96/x
  3. Step 3: Cross multiply
    70,739.68x = 97,620.56 × 38,908.96
  4. Step 4: Simplify right side
    70,739.68x = 3,798,314,464.22
  5. Step 5: Solve for x
    x = 3,798,314,464.22/70,739.68
  6. Step 6: Final answer
    x = 53,694.26

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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.