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Finding the Fourth Proportional to 186,478.70, 279,718.05 and 156,954.20

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Solution

The fourth proportional to 186,478.70, 279,718.05 and 156,954.20 is: 235,431.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,478.70 : 279,718.05 = 156,954.20 : x
  2. Step 2: Convert to fraction form
    186,478.70/279,718.05 = 156,954.20/x
  3. Step 3: Cross multiply
    186,478.70x = 279,718.05 × 156,954.20
  4. Step 4: Simplify right side
    186,478.70x = 43,902,922,763.31
  5. Step 5: Solve for x
    x = 43,902,922,763.31/186,478.70
  6. Step 6: Final answer
    x = 235,431.30

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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.