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Finding the Fourth Proportional to 258,753.87, 387,999.51 and 118,392.21

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Solution

The fourth proportional to 258,753.87, 387,999.51 and 118,392.21 is: 177,528.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,753.87 : 387,999.51 = 118,392.21 : x
  2. Step 2: Convert to fraction form
    258,753.87/387,999.51 = 118,392.21/x
  3. Step 3: Cross multiply
    258,753.87x = 387,999.51 × 118,392.21
  4. Step 4: Simplify right side
    258,753.87x = 45,936,119,467.82
  5. Step 5: Solve for x
    x = 45,936,119,467.82/258,753.87
  6. Step 6: Final answer
    x = 177,528.24

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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.