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Finding the Fourth Proportional to 258,133.62, 387,199.58 and 68,613.06

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Solution

The fourth proportional to 258,133.62, 387,199.58 and 68,613.06 is: 102,919.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,133.62 : 387,199.58 = 68,613.06 : x
  2. Step 2: Convert to fraction form
    258,133.62/387,199.58 = 68,613.06/x
  3. Step 3: Cross multiply
    258,133.62x = 387,199.58 × 68,613.06
  4. Step 4: Simplify right side
    258,133.62x = 26,566,948,014.51
  5. Step 5: Solve for x
    x = 26,566,948,014.51/258,133.62
  6. Step 6: Final answer
    x = 102,919.36

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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.