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Finding the Fourth Proportional to 78,650.40, 108,561.26 and 53,514.48

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Solution

The fourth proportional to 78,650.40, 108,561.26 and 53,514.48 is: 73,866.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,650.40 : 108,561.26 = 53,514.48 : x
  2. Step 2: Convert to fraction form
    78,650.40/108,561.26 = 53,514.48/x
  3. Step 3: Cross multiply
    78,650.40x = 108,561.26 × 53,514.48
  4. Step 4: Simplify right side
    78,650.40x = 5,809,599,377.04
  5. Step 5: Solve for x
    x = 5,809,599,377.04/78,650.40
  6. Step 6: Final answer
    x = 73,866.11

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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.