Home / 143,136.40-214,704.60-103,478.80

Finding the Fourth Proportional to 143,136.40, 214,704.60 and 103,478.80

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Solution

The fourth proportional to 143,136.40, 214,704.60 and 103,478.80 is: 155,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,136.40 : 214,704.60 = 103,478.80 : x
  2. Step 2: Convert to fraction form
    143,136.40/214,704.60 = 103,478.80/x
  3. Step 3: Cross multiply
    143,136.40x = 214,704.60 × 103,478.80
  4. Step 4: Simplify right side
    143,136.40x = 22,217,374,362.48
  5. Step 5: Solve for x
    x = 22,217,374,362.48/143,136.40
  6. Step 6: Final answer
    x = 155,218.20

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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.