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Finding the Fourth Proportional to 60,768.80, 91,152.60 and 19,215.80

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Solution

The fourth proportional to 60,768.80, 91,152.60 and 19,215.80 is: 28,823.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,768.80 : 91,152.60 = 19,215.80 : x
  2. Step 2: Convert to fraction form
    60,768.80/91,152.60 = 19,215.80/x
  3. Step 3: Cross multiply
    60,768.80x = 91,152.60 × 19,215.80
  4. Step 4: Simplify right side
    60,768.80x = 1,751,570,131.08
  5. Step 5: Solve for x
    x = 1,751,570,131.08/60,768.80
  6. Step 6: Final answer
    x = 28,823.51

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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.