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Finding the Fourth Proportional to 85,358.61, 128,005.11 and 58,983.39

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Solution

The fourth proportional to 85,358.61, 128,005.11 and 58,983.39 is: 88,452.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,358.61 : 128,005.11 = 58,983.39 : x
  2. Step 2: Convert to fraction form
    85,358.61/128,005.11 = 58,983.39/x
  3. Step 3: Cross multiply
    85,358.61x = 128,005.11 × 58,983.39
  4. Step 4: Simplify right side
    85,358.61x = 7,550,175,325.12
  5. Step 5: Solve for x
    x = 7,550,175,325.12/85,358.61
  6. Step 6: Final answer
    x = 88,452.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.