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Finding the Fourth Proportional to 55,425.60, 83,171.18 and 20,389.84

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Solution

The fourth proportional to 55,425.60, 83,171.18 and 20,389.84 is: 30,596.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,425.60 : 83,171.18 = 20,389.84 : x
  2. Step 2: Convert to fraction form
    55,425.60/83,171.18 = 20,389.84/x
  3. Step 3: Cross multiply
    55,425.60x = 83,171.18 × 20,389.84
  4. Step 4: Simplify right side
    55,425.60x = 1,695,847,052.81
  5. Step 5: Solve for x
    x = 1,695,847,052.81/55,425.60
  6. Step 6: Final answer
    x = 30,596.82

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.