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Finding the Fourth Proportional to 91,615.65, 136,695.07 and 80,396.34

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Solution

The fourth proportional to 91,615.65, 136,695.07 and 80,396.34 is: 119,955.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,615.65 : 136,695.07 = 80,396.34 : x
  2. Step 2: Convert to fraction form
    91,615.65/136,695.07 = 80,396.34/x
  3. Step 3: Cross multiply
    91,615.65x = 136,695.07 × 80,396.34
  4. Step 4: Simplify right side
    91,615.65x = 10,989,783,324.04
  5. Step 5: Solve for x
    x = 10,989,783,324.04/91,615.65
  6. Step 6: Final answer
    x = 119,955.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.