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Finding the Fourth Proportional to 221,250.40, 331,876.80 and 55,038.40

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Solution

The fourth proportional to 221,250.40, 331,876.80 and 55,038.40 is: 82,557.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,250.40 : 331,876.80 = 55,038.40 : x
  2. Step 2: Convert to fraction form
    221,250.40/331,876.80 = 55,038.40/x
  3. Step 3: Cross multiply
    221,250.40x = 331,876.80 × 55,038.40
  4. Step 4: Simplify right side
    221,250.40x = 18,265,968,069.12
  5. Step 5: Solve for x
    x = 18,265,968,069.12/221,250.40
  6. Step 6: Final answer
    x = 82,557.90

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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.