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Finding the Fourth Proportional to 186,672.90, 279,984.15 and 74,435.70

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Solution

The fourth proportional to 186,672.90, 279,984.15 and 74,435.70 is: 111,643.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,672.90 : 279,984.15 = 74,435.70 : x
  2. Step 2: Convert to fraction form
    186,672.90/279,984.15 = 74,435.70/x
  3. Step 3: Cross multiply
    186,672.90x = 279,984.15 × 74,435.70
  4. Step 4: Simplify right side
    186,672.90x = 20,840,816,194.16
  5. Step 5: Solve for x
    x = 20,840,816,194.16/186,672.90
  6. Step 6: Final answer
    x = 111,643.50

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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.