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Finding the Fourth Proportional to 82,395.80, 123,852.90 and 80,840.60

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Solution

The fourth proportional to 82,395.80, 123,852.90 and 80,840.60 is: 121,515.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,395.80 : 123,852.90 = 80,840.60 : x
  2. Step 2: Convert to fraction form
    82,395.80/123,852.90 = 80,840.60/x
  3. Step 3: Cross multiply
    82,395.80x = 123,852.90 × 80,840.60
  4. Step 4: Simplify right side
    82,395.80x = 10,012,342,747.74
  5. Step 5: Solve for x
    x = 10,012,342,747.74/82,395.80
  6. Step 6: Final answer
    x = 121,515.21

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1.5x scale

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.