Home / 204,821.28-307,283.76-86,431.68

Finding the Fourth Proportional to 204,821.28, 307,283.76 and 86,431.68

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Solution

The fourth proportional to 204,821.28, 307,283.76 and 86,431.68 is: 129,669.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,821.28 : 307,283.76 = 86,431.68 : x
  2. Step 2: Convert to fraction form
    204,821.28/307,283.76 = 86,431.68/x
  3. Step 3: Cross multiply
    204,821.28x = 307,283.76 × 86,431.68
  4. Step 4: Simplify right side
    204,821.28x = 26,559,051,613.52
  5. Step 5: Solve for x
    x = 26,559,051,613.52/204,821.28
  6. Step 6: Final answer
    x = 129,669.40

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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.