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Finding the Fourth Proportional to 186,690.43, 279,923.01 and 74,387.98

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Solution

The fourth proportional to 186,690.43, 279,923.01 and 74,387.98 is: 111,537.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,690.43 : 279,923.01 = 74,387.98 : x
  2. Step 2: Convert to fraction form
    186,690.43/279,923.01 = 74,387.98/x
  3. Step 3: Cross multiply
    186,690.43x = 279,923.01 × 74,387.98
  4. Step 4: Simplify right side
    186,690.43x = 20,822,907,269.42
  5. Step 5: Solve for x
    x = 20,822,907,269.42/186,690.43
  6. Step 6: Final answer
    x = 111,537.09

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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.