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Finding the Fourth Proportional to 64,716.58, 97,074.79 and 20,347.21

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Solution

The fourth proportional to 64,716.58, 97,074.79 and 20,347.21 is: 30,520.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,716.58 : 97,074.79 = 20,347.21 : x
  2. Step 2: Convert to fraction form
    64,716.58/97,074.79 = 20,347.21/x
  3. Step 3: Cross multiply
    64,716.58x = 97,074.79 × 20,347.21
  4. Step 4: Simplify right side
    64,716.58x = 1,975,201,137.84
  5. Step 5: Solve for x
    x = 1,975,201,137.84/64,716.58
  6. Step 6: Final answer
    x = 30,520.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.