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Finding the Fourth Proportional to 258,732.63, 387,668.34 and 90,160.04

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Solution

The fourth proportional to 258,732.63, 387,668.34 and 90,160.04 is: 135,090.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,732.63 : 387,668.34 = 90,160.04 : x
  2. Step 2: Convert to fraction form
    258,732.63/387,668.34 = 90,160.04/x
  3. Step 3: Cross multiply
    258,732.63x = 387,668.34 × 90,160.04
  4. Step 4: Simplify right side
    258,732.63x = 34,952,194,010.30
  5. Step 5: Solve for x
    x = 34,952,194,010.30/258,732.63
  6. Step 6: Final answer
    x = 135,090.01

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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.