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Finding the Fourth Proportional to 258,653.57, 387,996.75 and 81,167.58

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Solution

The fourth proportional to 258,653.57, 387,996.75 and 81,167.58 is: 121,756.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,653.57 : 387,996.75 = 81,167.58 : x
  2. Step 2: Convert to fraction form
    258,653.57/387,996.75 = 81,167.58/x
  3. Step 3: Cross multiply
    258,653.57x = 387,996.75 × 81,167.58
  4. Step 4: Simplify right side
    258,653.57x = 31,492,757,245.37
  5. Step 5: Solve for x
    x = 31,492,757,245.37/258,653.57
  6. Step 6: Final answer
    x = 121,756.51

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1.5x scale

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.