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Finding the Fourth Proportional to 98,992.55, 136,609.28 and 53,670.39

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Solution

The fourth proportional to 98,992.55, 136,609.28 and 53,670.39 is: 74,064.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,992.55 : 136,609.28 = 53,670.39 : x
  2. Step 2: Convert to fraction form
    98,992.55/136,609.28 = 53,670.39/x
  3. Step 3: Cross multiply
    98,992.55x = 136,609.28 × 53,670.39
  4. Step 4: Simplify right side
    98,992.55x = 7,331,872,383.82
  5. Step 5: Solve for x
    x = 7,331,872,383.82/98,992.55
  6. Step 6: Final answer
    x = 74,064.89

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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.