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Finding the Fourth Proportional to 220,992.60, 331,513.38 and 78,871.02

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Solution

The fourth proportional to 220,992.60, 331,513.38 and 78,871.02 is: 118,315.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,992.60 : 331,513.38 = 78,871.02 : x
  2. Step 2: Convert to fraction form
    220,992.60/331,513.38 = 78,871.02/x
  3. Step 3: Cross multiply
    220,992.60x = 331,513.38 × 78,871.02
  4. Step 4: Simplify right side
    220,992.60x = 26,146,798,424.25
  5. Step 5: Solve for x
    x = 26,146,798,424.25/220,992.60
  6. Step 6: Final answer
    x = 118,315.27

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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.