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Finding the Fourth Proportional to 82,409.40, 123,537.30 and 57,449.40

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Solution

The fourth proportional to 82,409.40, 123,537.30 and 57,449.40 is: 86,120.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,409.40 : 123,537.30 = 57,449.40 : x
  2. Step 2: Convert to fraction form
    82,409.40/123,537.30 = 57,449.40/x
  3. Step 3: Cross multiply
    82,409.40x = 123,537.30 × 57,449.40
  4. Step 4: Simplify right side
    82,409.40x = 7,097,143,762.62
  5. Step 5: Solve for x
    x = 7,097,143,762.62/82,409.40
  6. Step 6: Final answer
    x = 86,120.56

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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.