Home / 81,101.12-111,906.78-45,289.40

Finding the Fourth Proportional to 81,101.12, 111,906.78 and 45,289.40

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Solution

The fourth proportional to 81,101.12, 111,906.78 and 45,289.40 is: 62,492.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,101.12 : 111,906.78 = 45,289.40 : x
  2. Step 2: Convert to fraction form
    81,101.12/111,906.78 = 45,289.40/x
  3. Step 3: Cross multiply
    81,101.12x = 111,906.78 × 45,289.40
  4. Step 4: Simplify right side
    81,101.12x = 5,068,190,922.13
  5. Step 5: Solve for x
    x = 5,068,190,922.13/81,101.12
  6. Step 6: Final answer
    x = 62,492.24

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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.