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Finding the Fourth Proportional to 111,553.32, 167,330.32 and 78,421.62

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Solution

The fourth proportional to 111,553.32, 167,330.32 and 78,421.62 is: 117,632.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,553.32 : 167,330.32 = 78,421.62 : x
  2. Step 2: Convert to fraction form
    111,553.32/167,330.32 = 78,421.62/x
  3. Step 3: Cross multiply
    111,553.32x = 167,330.32 × 78,421.62
  4. Step 4: Simplify right side
    111,553.32x = 13,122,314,769.52
  5. Step 5: Solve for x
    x = 13,122,314,769.52/111,553.32
  6. Step 6: Final answer
    x = 117,632.67

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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.