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Finding the Fourth Proportional to 186,316.40, 279,449.40 and 74,079.20

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Solution

The fourth proportional to 186,316.40, 279,449.40 and 74,079.20 is: 111,108.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,316.40 : 279,449.40 = 74,079.20 : x
  2. Step 2: Convert to fraction form
    186,316.40/279,449.40 = 74,079.20/x
  3. Step 3: Cross multiply
    186,316.40x = 279,449.40 × 74,079.20
  4. Step 4: Simplify right side
    186,316.40x = 20,701,387,992.48
  5. Step 5: Solve for x
    x = 20,701,387,992.48/186,316.40
  6. Step 6: Final answer
    x = 111,108.78

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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.