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Finding the Fourth Proportional to 79,173.68, 118,749.54 and 20,005.72

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Solution

The fourth proportional to 79,173.68, 118,749.54 and 20,005.72 is: 30,005.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,173.68 : 118,749.54 = 20,005.72 : x
  2. Step 2: Convert to fraction form
    79,173.68/118,749.54 = 20,005.72/x
  3. Step 3: Cross multiply
    79,173.68x = 118,749.54 × 20,005.72
  4. Step 4: Simplify right side
    79,173.68x = 2,375,670,047.37
  5. Step 5: Solve for x
    x = 2,375,670,047.37/79,173.68
  6. Step 6: Final answer
    x = 30,005.81

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1.5x scale

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.