Home / 72,219.84-108,271.06-30,131.28

Finding the Fourth Proportional to 72,219.84, 108,271.06 and 30,131.28

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Solution

The fourth proportional to 72,219.84, 108,271.06 and 30,131.28 is: 45,172.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,219.84 : 108,271.06 = 30,131.28 : x
  2. Step 2: Convert to fraction form
    72,219.84/108,271.06 = 30,131.28/x
  3. Step 3: Cross multiply
    72,219.84x = 108,271.06 × 30,131.28
  4. Step 4: Simplify right side
    72,219.84x = 3,262,345,624.76
  5. Step 5: Solve for x
    x = 3,262,345,624.76/72,219.84
  6. Step 6: Final answer
    x = 45,172.43

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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.