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Finding the Fourth Proportional to 118,078.80, 177,463.80 and 102,872.40

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Solution

The fourth proportional to 118,078.80, 177,463.80 and 102,872.40 is: 154,609.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,078.80 : 177,463.80 = 102,872.40 : x
  2. Step 2: Convert to fraction form
    118,078.80/177,463.80 = 102,872.40/x
  3. Step 3: Cross multiply
    118,078.80x = 177,463.80 × 102,872.40
  4. Step 4: Simplify right side
    118,078.80x = 18,256,127,019.12
  5. Step 5: Solve for x
    x = 18,256,127,019.12/118,078.80
  6. Step 6: Final answer
    x = 154,609.69

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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.