Home / 102,921.80-154,080.30-76,742.60

Finding the Fourth Proportional to 102,921.80, 154,080.30 and 76,742.60

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Solution

The fourth proportional to 102,921.80, 154,080.30 and 76,742.60 is: 114,888.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,921.80 : 154,080.30 = 76,742.60 : x
  2. Step 2: Convert to fraction form
    102,921.80/154,080.30 = 76,742.60/x
  3. Step 3: Cross multiply
    102,921.80x = 154,080.30 × 76,742.60
  4. Step 4: Simplify right side
    102,921.80x = 11,824,522,830.78
  5. Step 5: Solve for x
    x = 11,824,522,830.78/102,921.80
  6. Step 6: Final answer
    x = 114,888.42

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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.