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Finding the Fourth Proportional to 72,386.71, 108,579.71 and 18,351.41

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Solution

The fourth proportional to 72,386.71, 108,579.71 and 18,351.41 is: 27,527.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,386.71 : 108,579.71 = 18,351.41 : x
  2. Step 2: Convert to fraction form
    72,386.71/108,579.71 = 18,351.41/x
  3. Step 3: Cross multiply
    72,386.71x = 108,579.71 × 18,351.41
  4. Step 4: Simplify right side
    72,386.71x = 1,992,590,278.87
  5. Step 5: Solve for x
    x = 1,992,590,278.87/72,386.71
  6. Step 6: Final answer
    x = 27,527.02

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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.