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Finding the Fourth Proportional to 53,811.70, 80,717.55 and 34,128.70

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Solution

The fourth proportional to 53,811.70, 80,717.55 and 34,128.70 is: 51,193.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,811.70 : 80,717.55 = 34,128.70 : x
  2. Step 2: Convert to fraction form
    53,811.70/80,717.55 = 34,128.70/x
  3. Step 3: Cross multiply
    53,811.70x = 80,717.55 × 34,128.70
  4. Step 4: Simplify right side
    53,811.70x = 2,754,785,048.69
  5. Step 5: Solve for x
    x = 2,754,785,048.69/53,811.70
  6. Step 6: Final answer
    x = 51,193.05

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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.