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Finding the Fourth Proportional to 113,530.26, 156,647.79 and 65,780.70

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Solution

The fourth proportional to 113,530.26, 156,647.79 and 65,780.70 is: 90,763.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,530.26 : 156,647.79 = 65,780.70 : x
  2. Step 2: Convert to fraction form
    113,530.26/156,647.79 = 65,780.70/x
  3. Step 3: Cross multiply
    113,530.26x = 156,647.79 × 65,780.70
  4. Step 4: Simplify right side
    113,530.26x = 10,304,401,279.65
  5. Step 5: Solve for x
    x = 10,304,401,279.65/113,530.26
  6. Step 6: Final answer
    x = 90,763.48

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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.