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Finding the Fourth Proportional to 86,711.45, 129,988.29 and 33,369.40

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Solution

The fourth proportional to 86,711.45, 129,988.29 and 33,369.40 is: 50,023.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,711.45 : 129,988.29 = 33,369.40 : x
  2. Step 2: Convert to fraction form
    86,711.45/129,988.29 = 33,369.40/x
  3. Step 3: Cross multiply
    86,711.45x = 129,988.29 × 33,369.40
  4. Step 4: Simplify right side
    86,711.45x = 4,337,631,531.95
  5. Step 5: Solve for x
    x = 4,337,631,531.95/86,711.45
  6. Step 6: Final answer
    x = 50,023.75

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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.