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Finding the Fourth Proportional to 72,626.80, 108,940.20 and 51,631.60

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Solution

The fourth proportional to 72,626.80, 108,940.20 and 51,631.60 is: 77,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,626.80 : 108,940.20 = 51,631.60 : x
  2. Step 2: Convert to fraction form
    72,626.80/108,940.20 = 51,631.60/x
  3. Step 3: Cross multiply
    72,626.80x = 108,940.20 × 51,631.60
  4. Step 4: Simplify right side
    72,626.80x = 5,624,756,830.32
  5. Step 5: Solve for x
    x = 5,624,756,830.32/72,626.80
  6. Step 6: Final answer
    x = 77,447.40

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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.