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Finding the Fourth Proportional to 258,812.01, 387,903.13 and 138,573.38

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Solution

The fourth proportional to 258,812.01, 387,903.13 and 138,573.38 is: 207,691.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,812.01 : 387,903.13 = 138,573.38 : x
  2. Step 2: Convert to fraction form
    258,812.01/387,903.13 = 138,573.38/x
  3. Step 3: Cross multiply
    258,812.01x = 387,903.13 × 138,573.38
  4. Step 4: Simplify right side
    258,812.01x = 53,753,048,460.00
  5. Step 5: Solve for x
    x = 53,753,048,460.00/258,812.01
  6. Step 6: Final answer
    x = 207,691.48

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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.