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Finding the Fourth Proportional to 124,931.20, 187,396.80 and 82,940.80

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Solution

The fourth proportional to 124,931.20, 187,396.80 and 82,940.80 is: 124,411.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,931.20 : 187,396.80 = 82,940.80 : x
  2. Step 2: Convert to fraction form
    124,931.20/187,396.80 = 82,940.80/x
  3. Step 3: Cross multiply
    124,931.20x = 187,396.80 × 82,940.80
  4. Step 4: Simplify right side
    124,931.20x = 15,542,840,509.44
  5. Step 5: Solve for x
    x = 15,542,840,509.44/124,931.20
  6. Step 6: Final answer
    x = 124,411.20

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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.