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Finding the Fourth Proportional to 111,149.19, 153,385.47 and 63,402.44

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Solution

The fourth proportional to 111,149.19, 153,385.47 and 63,402.44 is: 87,495.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,149.19 : 153,385.47 = 63,402.44 : x
  2. Step 2: Convert to fraction form
    111,149.19/153,385.47 = 63,402.44/x
  3. Step 3: Cross multiply
    111,149.19x = 153,385.47 × 63,402.44
  4. Step 4: Simplify right side
    111,149.19x = 9,725,012,291.62
  5. Step 5: Solve for x
    x = 9,725,012,291.62/111,149.19
  6. Step 6: Final answer
    x = 87,495.13

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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.