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Finding the Fourth Proportional to 85,566.79, 128,353.83 and 26,401.15

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Solution

The fourth proportional to 85,566.79, 128,353.83 and 26,401.15 is: 39,602.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,566.79 : 128,353.83 = 26,401.15 : x
  2. Step 2: Convert to fraction form
    85,566.79/128,353.83 = 26,401.15/x
  3. Step 3: Cross multiply
    85,566.79x = 128,353.83 × 26,401.15
  4. Step 4: Simplify right side
    85,566.79x = 3,388,688,718.90
  5. Step 5: Solve for x
    x = 3,388,688,718.90/85,566.79
  6. Step 6: Final answer
    x = 39,602.85

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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.