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Finding the Fourth Proportional to 153,633.72, 211,894.35 and 99,935.89

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Solution

The fourth proportional to 153,633.72, 211,894.35 and 99,935.89 is: 137,833.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,633.72 : 211,894.35 = 99,935.89 : x
  2. Step 2: Convert to fraction form
    153,633.72/211,894.35 = 99,935.89/x
  3. Step 3: Cross multiply
    153,633.72x = 211,894.35 × 99,935.89
  4. Step 4: Simplify right side
    153,633.72x = 21,175,850,453.22
  5. Step 5: Solve for x
    x = 21,175,850,453.22/153,633.72
  6. Step 6: Final answer
    x = 137,833.35

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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.