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Finding the Fourth Proportional to 68,389.71, 94,393.54 and 40,104.51

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Solution

The fourth proportional to 68,389.71, 94,393.54 and 40,104.51 is: 55,353.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,389.71 : 94,393.54 = 40,104.51 : x
  2. Step 2: Convert to fraction form
    68,389.71/94,393.54 = 40,104.51/x
  3. Step 3: Cross multiply
    68,389.71x = 94,393.54 × 40,104.51
  4. Step 4: Simplify right side
    68,389.71x = 3,785,606,668.87
  5. Step 5: Solve for x
    x = 3,785,606,668.87/68,389.71
  6. Step 6: Final answer
    x = 55,353.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.