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Finding the Fourth Proportional to 220,692, 331,038.84 and 54,480

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Solution

The fourth proportional to 220,692, 331,038.84 and 54,480 is: 81,720.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,692 : 331,038.84 = 54,480 : x
  2. Step 2: Convert to fraction form
    220,692/331,038.84 = 54,480/x
  3. Step 3: Cross multiply
    220,692x = 331,038.84 × 54,480
  4. Step 4: Simplify right side
    220,692x = 18,034,996,003.20
  5. Step 5: Solve for x
    x = 18,034,996,003.20/220,692
  6. Step 6: Final answer
    x = 81,720.21

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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.