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Finding the Fourth Proportional to 103,626.60, 155,439.90 and 72,133.80

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Solution

The fourth proportional to 103,626.60, 155,439.90 and 72,133.80 is: 108,200.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,626.60 : 155,439.90 = 72,133.80 : x
  2. Step 2: Convert to fraction form
    103,626.60/155,439.90 = 72,133.80/x
  3. Step 3: Cross multiply
    103,626.60x = 155,439.90 × 72,133.80
  4. Step 4: Simplify right side
    103,626.60x = 11,212,470,658.62
  5. Step 5: Solve for x
    x = 11,212,470,658.62/103,626.60
  6. Step 6: Final answer
    x = 108,200.70

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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.