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Finding the Fourth Proportional to 111,154.39, 153,412.44 and 65,857.87

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Solution

The fourth proportional to 111,154.39, 153,412.44 and 65,857.87 is: 90,895.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,154.39 : 153,412.44 = 65,857.87 : x
  2. Step 2: Convert to fraction form
    111,154.39/153,412.44 = 65,857.87/x
  3. Step 3: Cross multiply
    111,154.39x = 153,412.44 × 65,857.87
  4. Step 4: Simplify right side
    111,154.39x = 10,103,416,529.90
  5. Step 5: Solve for x
    x = 10,103,416,529.90/111,154.39
  6. Step 6: Final answer
    x = 90,895.35

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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.