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Finding the Fourth Proportional to 80,603.45, 120,905.01 and 21,439.18

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Solution

The fourth proportional to 80,603.45, 120,905.01 and 21,439.18 is: 32,158.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,603.45 : 120,905.01 = 21,439.18 : x
  2. Step 2: Convert to fraction form
    80,603.45/120,905.01 = 21,439.18/x
  3. Step 3: Cross multiply
    80,603.45x = 120,905.01 × 21,439.18
  4. Step 4: Simplify right side
    80,603.45x = 2,592,104,272.29
  5. Step 5: Solve for x
    x = 2,592,104,272.29/80,603.45
  6. Step 6: Final answer
    x = 32,158.73

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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.