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Finding the Fourth Proportional to 51,409.54, 70,951.77 and 28,749.80

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Solution

The fourth proportional to 51,409.54, 70,951.77 and 28,749.80 is: 39,678.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,409.54 : 70,951.77 = 28,749.80 : x
  2. Step 2: Convert to fraction form
    51,409.54/70,951.77 = 28,749.80/x
  3. Step 3: Cross multiply
    51,409.54x = 70,951.77 × 28,749.80
  4. Step 4: Simplify right side
    51,409.54x = 2,039,849,197.15
  5. Step 5: Solve for x
    x = 2,039,849,197.15/51,409.54
  6. Step 6: Final answer
    x = 39,678.42

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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.