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Finding the Fourth Proportional to 85,395.76, 117,585.28 and 77,385.88

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Solution

The fourth proportional to 85,395.76, 117,585.28 and 77,385.88 is: 106,556.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,395.76 : 117,585.28 = 77,385.88 : x
  2. Step 2: Convert to fraction form
    85,395.76/117,585.28 = 77,385.88/x
  3. Step 3: Cross multiply
    85,395.76x = 117,585.28 × 77,385.88
  4. Step 4: Simplify right side
    85,395.76x = 9,099,440,367.85
  5. Step 5: Solve for x
    x = 9,099,440,367.85/85,395.76
  6. Step 6: Final answer
    x = 106,556.11

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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.