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Finding the Fourth Proportional to 80,603.80, 120,748.04 and 66,392.67

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Solution

The fourth proportional to 80,603.80, 120,748.04 and 66,392.67 is: 99,459.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,603.80 : 120,748.04 = 66,392.67 : x
  2. Step 2: Convert to fraction form
    80,603.80/120,748.04 = 66,392.67/x
  3. Step 3: Cross multiply
    80,603.80x = 120,748.04 × 66,392.67
  4. Step 4: Simplify right side
    80,603.80x = 8,016,784,772.87
  5. Step 5: Solve for x
    x = 8,016,784,772.87/80,603.80
  6. Step 6: Final answer
    x = 99,459.14

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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.