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Finding the Fourth Proportional to 186,666.40, 279,974.40 and 74,429.20

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Solution

The fourth proportional to 186,666.40, 279,974.40 and 74,429.20 is: 111,633.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,666.40 : 279,974.40 = 74,429.20 : x
  2. Step 2: Convert to fraction form
    186,666.40/279,974.40 = 74,429.20/x
  3. Step 3: Cross multiply
    186,666.40x = 279,974.40 × 74,429.20
  4. Step 4: Simplify right side
    186,666.40x = 20,838,270,612.48
  5. Step 5: Solve for x
    x = 20,838,270,612.48/186,666.40
  6. Step 6: Final answer
    x = 111,633.75

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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.