Home / 81,348.39-121,970.34-39,173.31

Finding the Fourth Proportional to 81,348.39, 121,970.34 and 39,173.31

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Solution

The fourth proportional to 81,348.39, 121,970.34 and 39,173.31 is: 58,734.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,348.39 : 121,970.34 = 39,173.31 : x
  2. Step 2: Convert to fraction form
    81,348.39/121,970.34 = 39,173.31/x
  3. Step 3: Cross multiply
    81,348.39x = 121,970.34 × 39,173.31
  4. Step 4: Simplify right side
    81,348.39x = 4,777,981,939.63
  5. Step 5: Solve for x
    x = 4,777,981,939.63/81,348.39
  6. Step 6: Final answer
    x = 58,734.81

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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.