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Finding the Fourth Proportional to 111,606.32, 153,992.76 and 66,299.58

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Solution

The fourth proportional to 111,606.32, 153,992.76 and 66,299.58 is: 91,479.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,606.32 : 153,992.76 = 66,299.58 : x
  2. Step 2: Convert to fraction form
    111,606.32/153,992.76 = 66,299.58/x
  3. Step 3: Cross multiply
    111,606.32x = 153,992.76 × 66,299.58
  4. Step 4: Simplify right side
    111,606.32x = 10,209,655,311.04
  5. Step 5: Solve for x
    x = 10,209,655,311.04/111,606.32
  6. Step 6: Final answer
    x = 91,479.19

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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.