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Finding the Fourth Proportional to 85,459.65, 128,179.39 and 53,776.23

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Solution

The fourth proportional to 85,459.65, 128,179.39 and 53,776.23 is: 80,658.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,459.65 : 128,179.39 = 53,776.23 : x
  2. Step 2: Convert to fraction form
    85,459.65/128,179.39 = 53,776.23/x
  3. Step 3: Cross multiply
    85,459.65x = 128,179.39 × 53,776.23
  4. Step 4: Simplify right side
    85,459.65x = 6,893,004,357.90
  5. Step 5: Solve for x
    x = 6,893,004,357.90/85,459.65
  6. Step 6: Final answer
    x = 80,658.00

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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.