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Finding the Fourth Proportional to 186,407.40, 279,709.52 and 81,234.60

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Solution

The fourth proportional to 186,407.40, 279,709.52 and 81,234.60 is: 121,894.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,407.40 : 279,709.52 = 81,234.60 : x
  2. Step 2: Convert to fraction form
    186,407.40/279,709.52 = 81,234.60/x
  3. Step 3: Cross multiply
    186,407.40x = 279,709.52 × 81,234.60
  4. Step 4: Simplify right side
    186,407.40x = 22,722,090,973.39
  5. Step 5: Solve for x
    x = 22,722,090,973.39/186,407.40
  6. Step 6: Final answer
    x = 121,894.79

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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.