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Finding the Fourth Proportional to 104,171.55, 155,812.34 and 86,969.89

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Solution

The fourth proportional to 104,171.55, 155,812.34 and 86,969.89 is: 130,083.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,171.55 : 155,812.34 = 86,969.89 : x
  2. Step 2: Convert to fraction form
    104,171.55/155,812.34 = 86,969.89/x
  3. Step 3: Cross multiply
    104,171.55x = 155,812.34 × 86,969.89
  4. Step 4: Simplify right side
    104,171.55x = 13,550,981,409.13
  5. Step 5: Solve for x
    x = 13,550,981,409.13/104,171.55
  6. Step 6: Final answer
    x = 130,083.32

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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.