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Finding the Fourth Proportional to 248,087.40, 371,720.70 and 142,722.60

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Solution

The fourth proportional to 248,087.40, 371,720.70 and 142,722.60 is: 213,847.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,087.40 : 371,720.70 = 142,722.60 : x
  2. Step 2: Convert to fraction form
    248,087.40/371,720.70 = 142,722.60/x
  3. Step 3: Cross multiply
    248,087.40x = 371,720.70 × 142,722.60
  4. Step 4: Simplify right side
    248,087.40x = 53,052,944,777.82
  5. Step 5: Solve for x
    x = 53,052,944,777.82/248,087.40
  6. Step 6: Final answer
    x = 213,847.80

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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.