Home / 82,455.21-123,613.56-57,421.35

Finding the Fourth Proportional to 82,455.21, 123,613.56 and 57,421.35

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Solution

The fourth proportional to 82,455.21, 123,613.56 and 57,421.35 is: 86,083.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,455.21 : 123,613.56 = 57,421.35 : x
  2. Step 2: Convert to fraction form
    82,455.21/123,613.56 = 57,421.35/x
  3. Step 3: Cross multiply
    82,455.21x = 123,613.56 × 57,421.35
  4. Step 4: Simplify right side
    82,455.21x = 7,098,057,493.51
  5. Step 5: Solve for x
    x = 7,098,057,493.51/82,455.21
  6. Step 6: Final answer
    x = 86,083.80

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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.