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Finding the Fourth Proportional to 111,385.40, 153,690.12 and 66,054.92

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Solution

The fourth proportional to 111,385.40, 153,690.12 and 66,054.92 is: 91,142.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,385.40 : 153,690.12 = 66,054.92 : x
  2. Step 2: Convert to fraction form
    111,385.40/153,690.12 = 66,054.92/x
  3. Step 3: Cross multiply
    111,385.40x = 153,690.12 × 66,054.92
  4. Step 4: Simplify right side
    111,385.40x = 10,151,988,581.39
  5. Step 5: Solve for x
    x = 10,151,988,581.39/111,385.40
  6. Step 6: Final answer
    x = 91,142.90

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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.