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Finding the Fourth Proportional to 77,119.80, 106,391.72 and 45,233.32

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Solution

The fourth proportional to 77,119.80, 106,391.72 and 45,233.32 is: 62,402.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,119.80 : 106,391.72 = 45,233.32 : x
  2. Step 2: Convert to fraction form
    77,119.80/106,391.72 = 45,233.32/x
  3. Step 3: Cross multiply
    77,119.80x = 106,391.72 × 45,233.32
  4. Step 4: Simplify right side
    77,119.80x = 4,812,450,716.11
  5. Step 5: Solve for x
    x = 4,812,450,716.11/77,119.80
  6. Step 6: Final answer
    x = 62,402.27

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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.