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Finding the Fourth Proportional to 82,260.80, 123,218.40 and 45,281.60

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Solution

The fourth proportional to 82,260.80, 123,218.40 and 45,281.60 is: 67,827.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,260.80 : 123,218.40 = 45,281.60 : x
  2. Step 2: Convert to fraction form
    82,260.80/123,218.40 = 45,281.60/x
  3. Step 3: Cross multiply
    82,260.80x = 123,218.40 × 45,281.60
  4. Step 4: Simplify right side
    82,260.80x = 5,579,526,301.44
  5. Step 5: Solve for x
    x = 5,579,526,301.44/82,260.80
  6. Step 6: Final answer
    x = 67,827.28

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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.