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Finding the Fourth Proportional to 186,419.70, 279,629.55 and 81,443.70

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Solution

The fourth proportional to 186,419.70, 279,629.55 and 81,443.70 is: 122,165.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,419.70 : 279,629.55 = 81,443.70 : x
  2. Step 2: Convert to fraction form
    186,419.70/279,629.55 = 81,443.70/x
  3. Step 3: Cross multiply
    186,419.70x = 279,629.55 × 81,443.70
  4. Step 4: Simplify right side
    186,419.70x = 22,774,065,181.34
  5. Step 5: Solve for x
    x = 22,774,065,181.34/186,419.70
  6. Step 6: Final answer
    x = 122,165.55

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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.