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Finding the Fourth Proportional to 104,620.80, 144,360 and 68,825.28

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Solution

The fourth proportional to 104,620.80, 144,360 and 68,825.28 is: 94,967.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,620.80 : 144,360 = 68,825.28 : x
  2. Step 2: Convert to fraction form
    104,620.80/144,360 = 68,825.28/x
  3. Step 3: Cross multiply
    104,620.80x = 144,360 × 68,825.28
  4. Step 4: Simplify right side
    104,620.80x = 9,935,617,420.80
  5. Step 5: Solve for x
    x = 9,935,617,420.80/104,620.80
  6. Step 6: Final answer
    x = 94,967.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.