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Finding the Fourth Proportional to 201,320.80, 301,981.20 and 82,931.20

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Solution

The fourth proportional to 201,320.80, 301,981.20 and 82,931.20 is: 124,396.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,320.80 : 301,981.20 = 82,931.20 : x
  2. Step 2: Convert to fraction form
    201,320.80/301,981.20 = 82,931.20/x
  3. Step 3: Cross multiply
    201,320.80x = 301,981.20 × 82,931.20
  4. Step 4: Simplify right side
    201,320.80x = 25,043,663,293.44
  5. Step 5: Solve for x
    x = 25,043,663,293.44/201,320.80
  6. Step 6: Final answer
    x = 124,396.80

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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.