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Finding the Fourth Proportional to 85,962.60, 128,866.14 and 30,545.64

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Solution

The fourth proportional to 85,962.60, 128,866.14 and 30,545.64 is: 45,790.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,962.60 : 128,866.14 = 30,545.64 : x
  2. Step 2: Convert to fraction form
    85,962.60/128,866.14 = 30,545.64/x
  3. Step 3: Cross multiply
    85,962.60x = 128,866.14 × 30,545.64
  4. Step 4: Simplify right side
    85,962.60x = 3,936,298,720.63
  5. Step 5: Solve for x
    x = 3,936,298,720.63/85,962.60
  6. Step 6: Final answer
    x = 45,790.83

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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.