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Finding the Fourth Proportional to 186,589.72, 279,804.62 and 86,739.50

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Solution

The fourth proportional to 186,589.72, 279,804.62 and 86,739.50 is: 130,072.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,589.72 : 279,804.62 = 86,739.50 : x
  2. Step 2: Convert to fraction form
    186,589.72/279,804.62 = 86,739.50/x
  3. Step 3: Cross multiply
    186,589.72x = 279,804.62 × 86,739.50
  4. Step 4: Simplify right side
    186,589.72x = 24,270,112,836.49
  5. Step 5: Solve for x
    x = 24,270,112,836.49/186,589.72
  6. Step 6: Final answer
    x = 130,072.08

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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.