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Finding the Fourth Proportional to 186,663.40, 279,969.90 and 74,426.20

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Solution

The fourth proportional to 186,663.40, 279,969.90 and 74,426.20 is: 111,629.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,663.40 : 279,969.90 = 74,426.20 : x
  2. Step 2: Convert to fraction form
    186,663.40/279,969.90 = 74,426.20/x
  3. Step 3: Cross multiply
    186,663.40x = 279,969.90 × 74,426.20
  4. Step 4: Simplify right side
    186,663.40x = 20,837,095,771.38
  5. Step 5: Solve for x
    x = 20,837,095,771.38/186,663.40
  6. Step 6: Final answer
    x = 111,629.25

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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.