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Finding the Fourth Proportional to 99,768.80, 149,660.40 and 60,240.80

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Solution

The fourth proportional to 99,768.80, 149,660.40 and 60,240.80 is: 90,365.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,768.80 : 149,660.40 = 60,240.80 : x
  2. Step 2: Convert to fraction form
    99,768.80/149,660.40 = 60,240.80/x
  3. Step 3: Cross multiply
    99,768.80x = 149,660.40 × 60,240.80
  4. Step 4: Simplify right side
    99,768.80x = 9,015,662,224.32
  5. Step 5: Solve for x
    x = 9,015,662,224.32/99,768.80
  6. Step 6: Final answer
    x = 90,365.55

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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.