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Finding the Fourth Proportional to 98,576.30, 135,604.85 and 86,422.05

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Solution

The fourth proportional to 98,576.30, 135,604.85 and 86,422.05 is: 118,885.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,576.30 : 135,604.85 = 86,422.05 : x
  2. Step 2: Convert to fraction form
    98,576.30/135,604.85 = 86,422.05/x
  3. Step 3: Cross multiply
    98,576.30x = 135,604.85 × 86,422.05
  4. Step 4: Simplify right side
    98,576.30x = 11,719,248,016.81
  5. Step 5: Solve for x
    x = 11,719,248,016.81/98,576.30
  6. Step 6: Final answer
    x = 118,885.05

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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.