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Finding the Fourth Proportional to 53,989.79, 80,989.74 and 20,246.81

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Solution

The fourth proportional to 53,989.79, 80,989.74 and 20,246.81 is: 30,372.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,989.79 : 80,989.74 = 20,246.81 : x
  2. Step 2: Convert to fraction form
    53,989.79/80,989.74 = 20,246.81/x
  3. Step 3: Cross multiply
    53,989.79x = 80,989.74 × 20,246.81
  4. Step 4: Simplify right side
    53,989.79x = 1,639,783,472.78
  5. Step 5: Solve for x
    x = 1,639,783,472.78/53,989.79
  6. Step 6: Final answer
    x = 30,372.11

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Why These Related Problems?

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