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Finding the Fourth Proportional to 258,448.61, 387,672.93 and 80,956.26

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Solution

The fourth proportional to 258,448.61, 387,672.93 and 80,956.26 is: 121,434.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,448.61 : 387,672.93 = 80,956.26 : x
  2. Step 2: Convert to fraction form
    258,448.61/387,672.93 = 80,956.26/x
  3. Step 3: Cross multiply
    258,448.61x = 387,672.93 × 80,956.26
  4. Step 4: Simplify right side
    258,448.61x = 31,384,550,516.04
  5. Step 5: Solve for x
    x = 31,384,550,516.04/258,448.61
  6. Step 6: Final answer
    x = 121,434.39

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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.