Home / 115,279.48-159,114.20-78,546.47

Finding the Fourth Proportional to 115,279.48, 159,114.20 and 78,546.47

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Solution

The fourth proportional to 115,279.48, 159,114.20 and 78,546.47 is: 108,413.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,279.48 : 159,114.20 = 78,546.47 : x
  2. Step 2: Convert to fraction form
    115,279.48/159,114.20 = 78,546.47/x
  3. Step 3: Cross multiply
    115,279.48x = 159,114.20 × 78,546.47
  4. Step 4: Simplify right side
    115,279.48x = 12,497,858,137.67
  5. Step 5: Solve for x
    x = 12,497,858,137.67/115,279.48
  6. Step 6: Final answer
    x = 108,413.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.