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Finding the Fourth Proportional to 98,015.96, 135,309.54 and 65,738.80

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Solution

The fourth proportional to 98,015.96, 135,309.54 and 65,738.80 is: 90,751.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,015.96 : 135,309.54 = 65,738.80 : x
  2. Step 2: Convert to fraction form
    98,015.96/135,309.54 = 65,738.80/x
  3. Step 3: Cross multiply
    98,015.96x = 135,309.54 × 65,738.80
  4. Step 4: Simplify right side
    98,015.96x = 8,895,086,788.15
  5. Step 5: Solve for x
    x = 8,895,086,788.15/98,015.96
  6. Step 6: Final answer
    x = 90,751.41

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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.