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Finding the Fourth Proportional to 119,639.05, 165,094.45 and 65,921.06

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Solution

The fourth proportional to 119,639.05, 165,094.45 and 65,921.06 is: 90,966.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,639.05 : 165,094.45 = 65,921.06 : x
  2. Step 2: Convert to fraction form
    119,639.05/165,094.45 = 65,921.06/x
  3. Step 3: Cross multiply
    119,639.05x = 165,094.45 × 65,921.06
  4. Step 4: Simplify right side
    119,639.05x = 10,883,201,144.12
  5. Step 5: Solve for x
    x = 10,883,201,144.12/119,639.05
  6. Step 6: Final answer
    x = 90,966.96

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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.