Home / 140,051.20-209,742.72-80,762.88

Finding the Fourth Proportional to 140,051.20, 209,742.72 and 80,762.88

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Solution

The fourth proportional to 140,051.20, 209,742.72 and 80,762.88 is: 120,951.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,051.20 : 209,742.72 = 80,762.88 : x
  2. Step 2: Convert to fraction form
    140,051.20/209,742.72 = 80,762.88/x
  3. Step 3: Cross multiply
    140,051.20x = 209,742.72 × 80,762.88
  4. Step 4: Simplify right side
    140,051.20x = 16,939,426,126.23
  5. Step 5: Solve for x
    x = 16,939,426,126.23/140,051.20
  6. Step 6: Final answer
    x = 120,951.67

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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.