Home / 111,921.36-154,405.20-66,590.28

Finding the Fourth Proportional to 111,921.36, 154,405.20 and 66,590.28

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Solution

The fourth proportional to 111,921.36, 154,405.20 and 66,590.28 is: 91,867.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,921.36 : 154,405.20 = 66,590.28 : x
  2. Step 2: Convert to fraction form
    111,921.36/154,405.20 = 66,590.28/x
  3. Step 3: Cross multiply
    111,921.36x = 154,405.20 × 66,590.28
  4. Step 4: Simplify right side
    111,921.36x = 10,281,885,501.46
  5. Step 5: Solve for x
    x = 10,281,885,501.46/111,921.36
  6. Step 6: Final answer
    x = 91,867.05

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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.