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Finding the Fourth Proportional to 76,280.92, 105,230.26 and 66,195.20

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Solution

The fourth proportional to 76,280.92, 105,230.26 and 66,195.20 is: 91,316.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,280.92 : 105,230.26 = 66,195.20 : x
  2. Step 2: Convert to fraction form
    76,280.92/105,230.26 = 66,195.20/x
  3. Step 3: Cross multiply
    76,280.92x = 105,230.26 × 66,195.20
  4. Step 4: Simplify right side
    76,280.92x = 6,965,738,106.75
  5. Step 5: Solve for x
    x = 6,965,738,106.75/76,280.92
  6. Step 6: Final answer
    x = 91,316.91

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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.