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Finding the Fourth Proportional to 186,152.48, 279,006.78 and 129,686.84

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Solution

The fourth proportional to 186,152.48, 279,006.78 and 129,686.84 is: 194,375.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,152.48 : 279,006.78 = 129,686.84 : x
  2. Step 2: Convert to fraction form
    186,152.48/279,006.78 = 129,686.84/x
  3. Step 3: Cross multiply
    186,152.48x = 279,006.78 × 129,686.84
  4. Step 4: Simplify right side
    186,152.48x = 36,183,507,636.78
  5. Step 5: Solve for x
    x = 36,183,507,636.78/186,152.48
  6. Step 6: Final answer
    x = 194,375.64

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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.