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Finding the Fourth Proportional to 78,321.92, 117,334.91 and 60,705.50

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Solution

The fourth proportional to 78,321.92, 117,334.91 and 60,705.50 is: 90,943.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,321.92 : 117,334.91 = 60,705.50 : x
  2. Step 2: Convert to fraction form
    78,321.92/117,334.91 = 60,705.50/x
  3. Step 3: Cross multiply
    78,321.92x = 117,334.91 × 60,705.50
  4. Step 4: Simplify right side
    78,321.92x = 7,122,873,944.09
  5. Step 5: Solve for x
    x = 7,122,873,944.09/78,321.92
  6. Step 6: Final answer
    x = 90,943.56

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1.5x scale

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.