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Finding the Fourth Proportional to 80,303.40, 120,339.68 and 45,168.84

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Solution

The fourth proportional to 80,303.40, 120,339.68 and 45,168.84 is: 67,688.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,303.40 : 120,339.68 = 45,168.84 : x
  2. Step 2: Convert to fraction form
    80,303.40/120,339.68 = 45,168.84/x
  3. Step 3: Cross multiply
    80,303.40x = 120,339.68 × 45,168.84
  4. Step 4: Simplify right side
    80,303.40x = 5,435,603,525.73
  5. Step 5: Solve for x
    x = 5,435,603,525.73/80,303.40
  6. Step 6: Final answer
    x = 67,688.34

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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.