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Finding the Fourth Proportional to 85,090, 127,636.08 and 29,686

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Solution

The fourth proportional to 85,090, 127,636.08 and 29,686 is: 44,529.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,090 : 127,636.08 = 29,686 : x
  2. Step 2: Convert to fraction form
    85,090/127,636.08 = 29,686/x
  3. Step 3: Cross multiply
    85,090x = 127,636.08 × 29,686
  4. Step 4: Simplify right side
    85,090x = 3,789,004,670.88
  5. Step 5: Solve for x
    x = 3,789,004,670.88/85,090
  6. Step 6: Final answer
    x = 44,529.38

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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.