Home / 68,074.20-102,111.36-21,330.72

Finding the Fourth Proportional to 68,074.20, 102,111.36 and 21,330.72

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Solution

The fourth proportional to 68,074.20, 102,111.36 and 21,330.72 is: 31,996.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,074.20 : 102,111.36 = 21,330.72 : x
  2. Step 2: Convert to fraction form
    68,074.20/102,111.36 = 21,330.72/x
  3. Step 3: Cross multiply
    68,074.20x = 102,111.36 × 21,330.72
  4. Step 4: Simplify right side
    68,074.20x = 2,178,108,828.98
  5. Step 5: Solve for x
    x = 2,178,108,828.98/68,074.20
  6. Step 6: Final answer
    x = 31,996.10

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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.