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Finding the Fourth Proportional to 86,405.38, 129,506.23 and 38,964.92

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Solution

The fourth proportional to 86,405.38, 129,506.23 and 38,964.92 is: 58,401.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,405.38 : 129,506.23 = 38,964.92 : x
  2. Step 2: Convert to fraction form
    86,405.38/129,506.23 = 38,964.92/x
  3. Step 3: Cross multiply
    86,405.38x = 129,506.23 × 38,964.92
  4. Step 4: Simplify right side
    86,405.38x = 5,046,199,891.45
  5. Step 5: Solve for x
    x = 5,046,199,891.45/86,405.38
  6. Step 6: Final answer
    x = 58,401.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.