Home / 438,613.38-657,943.56-139,116.69

Finding the Fourth Proportional to 438,613.38, 657,943.56 and 139,116.69

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Solution

The fourth proportional to 438,613.38, 657,943.56 and 139,116.69 is: 208,682.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,613.38 : 657,943.56 = 139,116.69 : x
  2. Step 2: Convert to fraction form
    438,613.38/657,943.56 = 139,116.69/x
  3. Step 3: Cross multiply
    438,613.38x = 657,943.56 × 139,116.69
  4. Step 4: Simplify right side
    438,613.38x = 91,530,930,274.02
  5. Step 5: Solve for x
    x = 91,530,930,274.02/438,613.38
  6. Step 6: Final answer
    x = 208,682.49

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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.