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Finding the Fourth Proportional to 111,388.19, 153,701.50 and 63,644.63

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Solution

The fourth proportional to 111,388.19, 153,701.50 and 63,644.63 is: 87,821.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,388.19 : 153,701.50 = 63,644.63 : x
  2. Step 2: Convert to fraction form
    111,388.19/153,701.50 = 63,644.63/x
  3. Step 3: Cross multiply
    111,388.19x = 153,701.50 × 63,644.63
  4. Step 4: Simplify right side
    111,388.19x = 9,782,274,779.72
  5. Step 5: Solve for x
    x = 9,782,274,779.72/111,388.19
  6. Step 6: Final answer
    x = 87,821.47

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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.