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Finding the Fourth Proportional to 82,840.80, 124,358.40 and 82,257.60

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Solution

The fourth proportional to 82,840.80, 124,358.40 and 82,257.60 is: 123,482.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,840.80 : 124,358.40 = 82,257.60 : x
  2. Step 2: Convert to fraction form
    82,840.80/124,358.40 = 82,257.60/x
  3. Step 3: Cross multiply
    82,840.80x = 124,358.40 × 82,257.60
  4. Step 4: Simplify right side
    82,840.80x = 10,229,423,523.84
  5. Step 5: Solve for x
    x = 10,229,423,523.84/82,840.80
  6. Step 6: Final answer
    x = 123,482.92

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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.