Home / 81,082.03-111,970.20-76,664.29

Finding the Fourth Proportional to 81,082.03, 111,970.20 and 76,664.29

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Solution

The fourth proportional to 81,082.03, 111,970.20 and 76,664.29 is: 105,869.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,082.03 : 111,970.20 = 76,664.29 : x
  2. Step 2: Convert to fraction form
    81,082.03/111,970.20 = 76,664.29/x
  3. Step 3: Cross multiply
    81,082.03x = 111,970.20 × 76,664.29
  4. Step 4: Simplify right side
    81,082.03x = 8,584,115,884.16
  5. Step 5: Solve for x
    x = 8,584,115,884.16/81,082.03
  6. Step 6: Final answer
    x = 105,869.52

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1.5x scale

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.