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Finding the Fourth Proportional to 72,113.57, 108,170.43 and 18,805.50

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Solution

The fourth proportional to 72,113.57, 108,170.43 and 18,805.50 is: 28,208.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,113.57 : 108,170.43 = 18,805.50 : x
  2. Step 2: Convert to fraction form
    72,113.57/108,170.43 = 18,805.50/x
  3. Step 3: Cross multiply
    72,113.57x = 108,170.43 × 18,805.50
  4. Step 4: Simplify right side
    72,113.57x = 2,034,199,021.37
  5. Step 5: Solve for x
    x = 2,034,199,021.37/72,113.57
  6. Step 6: Final answer
    x = 28,208.27

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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.