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Finding the Fourth Proportional to 72,136.40, 108,204.60 and 71,099.60

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Solution

The fourth proportional to 72,136.40, 108,204.60 and 71,099.60 is: 106,649.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,136.40 : 108,204.60 = 71,099.60 : x
  2. Step 2: Convert to fraction form
    72,136.40/108,204.60 = 71,099.60/x
  3. Step 3: Cross multiply
    72,136.40x = 108,204.60 × 71,099.60
  4. Step 4: Simplify right side
    72,136.40x = 7,693,303,778.16
  5. Step 5: Solve for x
    x = 7,693,303,778.16/72,136.40
  6. Step 6: Final answer
    x = 106,649.40

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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.