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Finding the Fourth Proportional to 154,793.93, 213,613.65 and 86,828.04

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Solution

The fourth proportional to 154,793.93, 213,613.65 and 86,828.04 is: 119,821.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,793.93 : 213,613.65 = 86,828.04 : x
  2. Step 2: Convert to fraction form
    154,793.93/213,613.65 = 86,828.04/x
  3. Step 3: Cross multiply
    154,793.93x = 213,613.65 × 86,828.04
  4. Step 4: Simplify right side
    154,793.93x = 18,547,654,546.75
  5. Step 5: Solve for x
    x = 18,547,654,546.75/154,793.93
  6. Step 6: Final answer
    x = 119,821.59

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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.