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Finding the Fourth Proportional to 85,394.76, 117,583.91 and 77,384.88

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Solution

The fourth proportional to 85,394.76, 117,583.91 and 77,384.88 is: 106,554.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,394.76 : 117,583.91 = 77,384.88 : x
  2. Step 2: Convert to fraction form
    85,394.76/117,583.91 = 77,384.88/x
  3. Step 3: Cross multiply
    85,394.76x = 117,583.91 × 77,384.88
  4. Step 4: Simplify right side
    85,394.76x = 9,099,216,378.36
  5. Step 5: Solve for x
    x = 9,099,216,378.36/85,394.76
  6. Step 6: Final answer
    x = 106,554.74

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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.