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Finding the Fourth Proportional to 190,676.71, 285,949.45 and 72,381.88

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Solution

The fourth proportional to 190,676.71, 285,949.45 and 72,381.88 is: 108,547.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,676.71 : 285,949.45 = 72,381.88 : x
  2. Step 2: Convert to fraction form
    190,676.71/285,949.45 = 72,381.88/x
  3. Step 3: Cross multiply
    190,676.71x = 285,949.45 × 72,381.88
  4. Step 4: Simplify right side
    190,676.71x = 20,697,558,775.97
  5. Step 5: Solve for x
    x = 20,697,558,775.97/190,676.71
  6. Step 6: Final answer
    x = 108,547.91

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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.