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Finding the Fourth Proportional to 72,662.74, 108,994.10 and 20,072.23

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Solution

The fourth proportional to 72,662.74, 108,994.10 and 20,072.23 is: 30,108.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,662.74 : 108,994.10 = 20,072.23 : x
  2. Step 2: Convert to fraction form
    72,662.74/108,994.10 = 20,072.23/x
  3. Step 3: Cross multiply
    72,662.74x = 108,994.10 × 20,072.23
  4. Step 4: Simplify right side
    72,662.74x = 2,187,754,271.00
  5. Step 5: Solve for x
    x = 2,187,754,271.00/72,662.74
  6. Step 6: Final answer
    x = 30,108.34

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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.