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Finding the Fourth Proportional to 154,820, 213,654.08 and 86,852.12

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Solution

The fourth proportional to 154,820, 213,654.08 and 86,852.12 is: 119,857.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,820 : 213,654.08 = 86,852.12 : x
  2. Step 2: Convert to fraction form
    154,820/213,654.08 = 86,852.12/x
  3. Step 3: Cross multiply
    154,820x = 213,654.08 × 86,852.12
  4. Step 4: Simplify right side
    154,820x = 18,556,309,794.65
  5. Step 5: Solve for x
    x = 18,556,309,794.65/154,820
  6. Step 6: Final answer
    x = 119,857.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.