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Finding the Fourth Proportional to 79,322.72, 118,921.08 and 39,313.64

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Solution

The fourth proportional to 79,322.72, 118,921.08 and 39,313.64 is: 58,939.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,322.72 : 118,921.08 = 39,313.64 : x
  2. Step 2: Convert to fraction form
    79,322.72/118,921.08 = 39,313.64/x
  3. Step 3: Cross multiply
    79,322.72x = 118,921.08 × 39,313.64
  4. Step 4: Simplify right side
    79,322.72x = 4,675,220,527.53
  5. Step 5: Solve for x
    x = 4,675,220,527.53/79,322.72
  6. Step 6: Final answer
    x = 58,939.24

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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.