Home / 258,766.56-388,149.72-71,778

Finding the Fourth Proportional to 258,766.56, 388,149.72 and 71,778

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Solution

The fourth proportional to 258,766.56, 388,149.72 and 71,778 is: 107,666.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,766.56 : 388,149.72 = 71,778 : x
  2. Step 2: Convert to fraction form
    258,766.56/388,149.72 = 71,778/x
  3. Step 3: Cross multiply
    258,766.56x = 388,149.72 × 71,778
  4. Step 4: Simplify right side
    258,766.56x = 27,860,610,602.16
  5. Step 5: Solve for x
    x = 27,860,610,602.16/258,766.56
  6. Step 6: Final answer
    x = 107,666.97

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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.