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Finding the Fourth Proportional to 91,141.57, 125,707.44 and 66,935.06

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Solution

The fourth proportional to 91,141.57, 125,707.44 and 66,935.06 is: 92,320.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,141.57 : 125,707.44 = 66,935.06 : x
  2. Step 2: Convert to fraction form
    91,141.57/125,707.44 = 66,935.06/x
  3. Step 3: Cross multiply
    91,141.57x = 125,707.44 × 66,935.06
  4. Step 4: Simplify right side
    91,141.57x = 8,414,235,132.72
  5. Step 5: Solve for x
    x = 8,414,235,132.72/91,141.57
  6. Step 6: Final answer
    x = 92,320.50

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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.