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Finding the Fourth Proportional to 85,112.54, 117,396.63 and 77,528.51

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Solution

The fourth proportional to 85,112.54, 117,396.63 and 77,528.51 is: 106,935.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,112.54 : 117,396.63 = 77,528.51 : x
  2. Step 2: Convert to fraction form
    85,112.54/117,396.63 = 77,528.51/x
  3. Step 3: Cross multiply
    85,112.54x = 117,396.63 × 77,528.51
  4. Step 4: Simplify right side
    85,112.54x = 9,101,585,215.94
  5. Step 5: Solve for x
    x = 9,101,585,215.94/85,112.54
  6. Step 6: Final answer
    x = 106,935.90

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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.