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Finding the Fourth Proportional to 76,260.44, 105,147.90 and 65,631.80

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Solution

The fourth proportional to 76,260.44, 105,147.90 and 65,631.80 is: 90,493.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,260.44 : 105,147.90 = 65,631.80 : x
  2. Step 2: Convert to fraction form
    76,260.44/105,147.90 = 65,631.80/x
  3. Step 3: Cross multiply
    76,260.44x = 105,147.90 × 65,631.80
  4. Step 4: Simplify right side
    76,260.44x = 6,901,045,943.22
  5. Step 5: Solve for x
    x = 6,901,045,943.22/76,260.44
  6. Step 6: Final answer
    x = 90,493.13

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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.