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Finding the Fourth Proportional to 78,672.40, 108,533.39 and 53,169.48

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Solution

The fourth proportional to 78,672.40, 108,533.39 and 53,169.48 is: 73,350.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,672.40 : 108,533.39 = 53,169.48 : x
  2. Step 2: Convert to fraction form
    78,672.40/108,533.39 = 53,169.48/x
  3. Step 3: Cross multiply
    78,672.40x = 108,533.39 × 53,169.48
  4. Step 4: Simplify right side
    78,672.40x = 5,770,663,643.09
  5. Step 5: Solve for x
    x = 5,770,663,643.09/78,672.40
  6. Step 6: Final answer
    x = 73,350.55

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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.