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Finding the Fourth Proportional to 104,719.87, 157,020.28 and 71,480.17

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Solution

The fourth proportional to 104,719.87, 157,020.28 and 71,480.17 is: 107,179.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,719.87 : 157,020.28 = 71,480.17 : x
  2. Step 2: Convert to fraction form
    104,719.87/157,020.28 = 71,480.17/x
  3. Step 3: Cross multiply
    104,719.87x = 157,020.28 × 71,480.17
  4. Step 4: Simplify right side
    104,719.87x = 11,223,836,307.85
  5. Step 5: Solve for x
    x = 11,223,836,307.85/104,719.87
  6. Step 6: Final answer
    x = 107,179.62

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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.