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Finding the Fourth Proportional to 81,618.99, 112,674.09 and 63,426.80

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Solution

The fourth proportional to 81,618.99, 112,674.09 and 63,426.80 is: 87,559.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,618.99 : 112,674.09 = 63,426.80 : x
  2. Step 2: Convert to fraction form
    81,618.99/112,674.09 = 63,426.80/x
  3. Step 3: Cross multiply
    81,618.99x = 112,674.09 × 63,426.80
  4. Step 4: Simplify right side
    81,618.99x = 7,146,556,408.24
  5. Step 5: Solve for x
    x = 7,146,556,408.24/81,618.99
  6. Step 6: Final answer
    x = 87,559.97

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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.