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Finding the Fourth Proportional to 113,860.80, 170,454.78 and 108,989.28

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Solution

The fourth proportional to 113,860.80, 170,454.78 and 108,989.28 is: 163,161.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,860.80 : 170,454.78 = 108,989.28 : x
  2. Step 2: Convert to fraction form
    113,860.80/170,454.78 = 108,989.28/x
  3. Step 3: Cross multiply
    113,860.80x = 170,454.78 × 108,989.28
  4. Step 4: Simplify right side
    113,860.80x = 18,577,743,744.76
  5. Step 5: Solve for x
    x = 18,577,743,744.76/113,860.80
  6. Step 6: Final answer
    x = 163,161.89

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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.