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Finding the Fourth Proportional to 55,643.55, 76,786.95 and 39,754.99

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Solution

The fourth proportional to 55,643.55, 76,786.95 and 39,754.99 is: 54,861.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,643.55 : 76,786.95 = 39,754.99 : x
  2. Step 2: Convert to fraction form
    55,643.55/76,786.95 = 39,754.99/x
  3. Step 3: Cross multiply
    55,643.55x = 76,786.95 × 39,754.99
  4. Step 4: Simplify right side
    55,643.55x = 3,052,664,429.38
  5. Step 5: Solve for x
    x = 3,052,664,429.38/55,643.55
  6. Step 6: Final answer
    x = 54,861.07

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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.