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Finding the Fourth Proportional to 70,697.58, 106,047.21 and 18,105.66

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Solution

The fourth proportional to 70,697.58, 106,047.21 and 18,105.66 is: 27,158.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,697.58 : 106,047.21 = 18,105.66 : x
  2. Step 2: Convert to fraction form
    70,697.58/106,047.21 = 18,105.66/x
  3. Step 3: Cross multiply
    70,697.58x = 106,047.21 × 18,105.66
  4. Step 4: Simplify right side
    70,697.58x = 1,920,054,728.21
  5. Step 5: Solve for x
    x = 1,920,054,728.21/70,697.58
  6. Step 6: Final answer
    x = 27,158.71

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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.