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Finding the Fourth Proportional to 310,791.03, 466,140.39 and 86,128.03

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Solution

The fourth proportional to 310,791.03, 466,140.39 and 86,128.03 is: 129,179.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,791.03 : 466,140.39 = 86,128.03 : x
  2. Step 2: Convert to fraction form
    310,791.03/466,140.39 = 86,128.03/x
  3. Step 3: Cross multiply
    310,791.03x = 466,140.39 × 86,128.03
  4. Step 4: Simplify right side
    310,791.03x = 40,147,753,494.13
  5. Step 5: Solve for x
    x = 40,147,753,494.13/310,791.03
  6. Step 6: Final answer
    x = 129,179.25

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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.