Home / 111,821.60-154,283.28-77,791.88

Finding the Fourth Proportional to 111,821.60, 154,283.28 and 77,791.88

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Solution

The fourth proportional to 111,821.60, 154,283.28 and 77,791.88 is: 107,331.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,821.60 : 154,283.28 = 77,791.88 : x
  2. Step 2: Convert to fraction form
    111,821.60/154,283.28 = 77,791.88/x
  3. Step 3: Cross multiply
    111,821.60x = 154,283.28 × 77,791.88
  4. Step 4: Simplify right side
    111,821.60x = 12,001,986,403.77
  5. Step 5: Solve for x
    x = 12,001,986,403.77/111,821.60
  6. Step 6: Final answer
    x = 107,331.56

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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.