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Finding the Fourth Proportional to 84,653.30, 126,840.53 and 65,886.11

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Solution

The fourth proportional to 84,653.30, 126,840.53 and 65,886.11 is: 98,720.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,653.30 : 126,840.53 = 65,886.11 : x
  2. Step 2: Convert to fraction form
    84,653.30/126,840.53 = 65,886.11/x
  3. Step 3: Cross multiply
    84,653.30x = 126,840.53 × 65,886.11
  4. Step 4: Simplify right side
    84,653.30x = 8,357,029,118.20
  5. Step 5: Solve for x
    x = 8,357,029,118.20/84,653.30
  6. Step 6: Final answer
    x = 98,720.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.