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Finding the Fourth Proportional to 111,580.75, 153,982.65 and 61,279.75

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Solution

The fourth proportional to 111,580.75, 153,982.65 and 61,279.75 is: 84,566.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,580.75 : 153,982.65 = 61,279.75 : x
  2. Step 2: Convert to fraction form
    111,580.75/153,982.65 = 61,279.75/x
  3. Step 3: Cross multiply
    111,580.75x = 153,982.65 × 61,279.75
  4. Step 4: Simplify right side
    111,580.75x = 9,436,018,296.34
  5. Step 5: Solve for x
    x = 9,436,018,296.34/111,580.75
  6. Step 6: Final answer
    x = 84,566.72

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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.