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Finding the Fourth Proportional to 111,534.70, 153,915.30 and 63,785.20

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Solution

The fourth proportional to 111,534.70, 153,915.30 and 63,785.20 is: 88,022.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,534.70 : 153,915.30 = 63,785.20 : x
  2. Step 2: Convert to fraction form
    111,534.70/153,915.30 = 63,785.20/x
  3. Step 3: Cross multiply
    111,534.70x = 153,915.30 × 63,785.20
  4. Step 4: Simplify right side
    111,534.70x = 9,817,518,193.56
  5. Step 5: Solve for x
    x = 9,817,518,193.56/111,534.70
  6. Step 6: Final answer
    x = 88,022.10

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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.