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Finding the Fourth Proportional to 204,819.20, 307,228.80 and 57,075.20

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Solution

The fourth proportional to 204,819.20, 307,228.80 and 57,075.20 is: 85,612.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,819.20 : 307,228.80 = 57,075.20 : x
  2. Step 2: Convert to fraction form
    204,819.20/307,228.80 = 57,075.20/x
  3. Step 3: Cross multiply
    204,819.20x = 307,228.80 × 57,075.20
  4. Step 4: Simplify right side
    204,819.20x = 17,535,145,205.76
  5. Step 5: Solve for x
    x = 17,535,145,205.76/204,819.20
  6. Step 6: Final answer
    x = 85,612.80

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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.