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Finding the Fourth Proportional to 111,507.36, 153,880.23 and 63,761.64

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Solution

The fourth proportional to 111,507.36, 153,880.23 and 63,761.64 is: 87,991.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,507.36 : 153,880.23 = 63,761.64 : x
  2. Step 2: Convert to fraction form
    111,507.36/153,880.23 = 63,761.64/x
  3. Step 3: Cross multiply
    111,507.36x = 153,880.23 × 63,761.64
  4. Step 4: Simplify right side
    111,507.36x = 9,811,655,828.38
  5. Step 5: Solve for x
    x = 9,811,655,828.38/111,507.36
  6. Step 6: Final answer
    x = 87,991.11

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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.