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Finding the Fourth Proportional to 142,647.40, 213,890.10 and 53,903.80

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Solution

The fourth proportional to 142,647.40, 213,890.10 and 53,903.80 is: 80,825.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,647.40 : 213,890.10 = 53,903.80 : x
  2. Step 2: Convert to fraction form
    142,647.40/213,890.10 = 53,903.80/x
  3. Step 3: Cross multiply
    142,647.40x = 213,890.10 × 53,903.80
  4. Step 4: Simplify right side
    142,647.40x = 11,529,489,172.38
  5. Step 5: Solve for x
    x = 11,529,489,172.38/142,647.40
  6. Step 6: Final answer
    x = 80,825.09

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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.