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Finding the Fourth Proportional to 76,249.44, 105,132.72 and 65,620.80

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Solution

The fourth proportional to 76,249.44, 105,132.72 and 65,620.80 is: 90,477.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,249.44 : 105,132.72 = 65,620.80 : x
  2. Step 2: Convert to fraction form
    76,249.44/105,132.72 = 65,620.80/x
  3. Step 3: Cross multiply
    76,249.44x = 105,132.72 × 65,620.80
  4. Step 4: Simplify right side
    76,249.44x = 6,898,893,192.58
  5. Step 5: Solve for x
    x = 6,898,893,192.58/76,249.44
  6. Step 6: Final answer
    x = 90,477.95

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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.