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Finding the Fourth Proportional to 66,979.52, 92,415.84 and 43,113.92

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Solution

The fourth proportional to 66,979.52, 92,415.84 and 43,113.92 is: 59,486.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,979.52 : 92,415.84 = 43,113.92 : x
  2. Step 2: Convert to fraction form
    66,979.52/92,415.84 = 43,113.92/x
  3. Step 3: Cross multiply
    66,979.52x = 92,415.84 × 43,113.92
  4. Step 4: Simplify right side
    66,979.52x = 3,984,409,132.49
  5. Step 5: Solve for x
    x = 3,984,409,132.49/66,979.52
  6. Step 6: Final answer
    x = 59,486.98

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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.