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Finding the Fourth Proportional to 98,776.96, 136,357.20 and 63,016

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Solution

The fourth proportional to 98,776.96, 136,357.20 and 63,016 is: 86,990.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,776.96 : 136,357.20 = 63,016 : x
  2. Step 2: Convert to fraction form
    98,776.96/136,357.20 = 63,016/x
  3. Step 3: Cross multiply
    98,776.96x = 136,357.20 × 63,016
  4. Step 4: Simplify right side
    98,776.96x = 8,592,685,315.20
  5. Step 5: Solve for x
    x = 8,592,685,315.20/98,776.96
  6. Step 6: Final answer
    x = 86,990.79

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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.