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Finding the Fourth Proportional to 111,488.82, 153,875.80 and 66,191.64

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Solution

The fourth proportional to 111,488.82, 153,875.80 and 66,191.64 is: 91,357.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,488.82 : 153,875.80 = 66,191.64 : x
  2. Step 2: Convert to fraction form
    111,488.82/153,875.80 = 66,191.64/x
  3. Step 3: Cross multiply
    111,488.82x = 153,875.80 × 66,191.64
  4. Step 4: Simplify right side
    111,488.82x = 10,185,291,558.31
  5. Step 5: Solve for x
    x = 10,185,291,558.31/111,488.82
  6. Step 6: Final answer
    x = 91,357.07

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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.