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Finding the Fourth Proportional to 48,311.70, 72,465.90 and 18,735.90

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Solution

The fourth proportional to 48,311.70, 72,465.90 and 18,735.90 is: 28,103.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,311.70 : 72,465.90 = 18,735.90 : x
  2. Step 2: Convert to fraction form
    48,311.70/72,465.90 = 18,735.90/x
  3. Step 3: Cross multiply
    48,311.70x = 72,465.90 × 18,735.90
  4. Step 4: Simplify right side
    48,311.70x = 1,357,713,855.81
  5. Step 5: Solve for x
    x = 1,357,713,855.81/48,311.70
  6. Step 6: Final answer
    x = 28,103.21

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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.