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Finding the Fourth Proportional to 58,761.90, 80,979.08 and 57,682.17

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Solution

The fourth proportional to 58,761.90, 80,979.08 and 57,682.17 is: 79,491.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,761.90 : 80,979.08 = 57,682.17 : x
  2. Step 2: Convert to fraction form
    58,761.90/80,979.08 = 57,682.17/x
  3. Step 3: Cross multiply
    58,761.90x = 80,979.08 × 57,682.17
  4. Step 4: Simplify right side
    58,761.90x = 4,671,048,770.59
  5. Step 5: Solve for x
    x = 4,671,048,770.59/58,761.90
  6. Step 6: Final answer
    x = 79,491.11

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1.5x scale

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.