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Finding the Fourth Proportional to 77,189.70, 115,776.72 and 52,389.12

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Solution

The fourth proportional to 77,189.70, 115,776.72 and 52,389.12 is: 78,578.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,189.70 : 115,776.72 = 52,389.12 : x
  2. Step 2: Convert to fraction form
    77,189.70/115,776.72 = 52,389.12/x
  3. Step 3: Cross multiply
    77,189.70x = 115,776.72 × 52,389.12
  4. Step 4: Simplify right side
    77,189.70x = 6,065,440,477.29
  5. Step 5: Solve for x
    x = 6,065,440,477.29/77,189.70
  6. Step 6: Final answer
    x = 78,578.37

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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.