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Finding the Fourth Proportional to 157,978.68, 236,960.72 and 39,647.40

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Solution

The fourth proportional to 157,978.68, 236,960.72 and 39,647.40 is: 59,469.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,978.68 : 236,960.72 = 39,647.40 : x
  2. Step 2: Convert to fraction form
    157,978.68/236,960.72 = 39,647.40/x
  3. Step 3: Cross multiply
    157,978.68x = 236,960.72 × 39,647.40
  4. Step 4: Simplify right side
    157,978.68x = 9,394,876,450.13
  5. Step 5: Solve for x
    x = 9,394,876,450.13/157,978.68
  6. Step 6: Final answer
    x = 59,469.27

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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.