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Finding the Fourth Proportional to 112,370.40, 168,361.20 and 72,907.20

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Solution

The fourth proportional to 112,370.40, 168,361.20 and 72,907.20 is: 109,234.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,370.40 : 168,361.20 = 72,907.20 : x
  2. Step 2: Convert to fraction form
    112,370.40/168,361.20 = 72,907.20/x
  3. Step 3: Cross multiply
    112,370.40x = 168,361.20 × 72,907.20
  4. Step 4: Simplify right side
    112,370.40x = 12,274,743,680.64
  5. Step 5: Solve for x
    x = 12,274,743,680.64/112,370.40
  6. Step 6: Final answer
    x = 109,234.67

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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.