Home / 81,083.04-111,971.58-76,665.30

Finding the Fourth Proportional to 81,083.04, 111,971.58 and 76,665.30

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Solution

The fourth proportional to 81,083.04, 111,971.58 and 76,665.30 is: 105,870.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,083.04 : 111,971.58 = 76,665.30 : x
  2. Step 2: Convert to fraction form
    81,083.04/111,971.58 = 76,665.30/x
  3. Step 3: Cross multiply
    81,083.04x = 111,971.58 × 76,665.30
  4. Step 4: Simplify right side
    81,083.04x = 8,584,334,772.17
  5. Step 5: Solve for x
    x = 8,584,334,772.17/81,083.04
  6. Step 6: Final answer
    x = 105,870.90

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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.