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Finding the Fourth Proportional to 111,785.76, 167,678.76 and 28,679.76

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Solution

The fourth proportional to 111,785.76, 167,678.76 and 28,679.76 is: 43,019.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,785.76 : 167,678.76 = 28,679.76 : x
  2. Step 2: Convert to fraction form
    111,785.76/167,678.76 = 28,679.76/x
  3. Step 3: Cross multiply
    111,785.76x = 167,678.76 × 28,679.76
  4. Step 4: Simplify right side
    111,785.76x = 4,808,986,593.90
  5. Step 5: Solve for x
    x = 4,808,986,593.90/111,785.76
  6. Step 6: Final answer
    x = 43,019.67

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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.