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Finding the Fourth Proportional to 71,437.70, 98,294.28 and 58,643.84

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Solution

The fourth proportional to 71,437.70, 98,294.28 and 58,643.84 is: 80,690.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,437.70 : 98,294.28 = 58,643.84 : x
  2. Step 2: Convert to fraction form
    71,437.70/98,294.28 = 58,643.84/x
  3. Step 3: Cross multiply
    71,437.70x = 98,294.28 × 58,643.84
  4. Step 4: Simplify right side
    71,437.70x = 5,764,354,029.24
  5. Step 5: Solve for x
    x = 5,764,354,029.24/71,437.70
  6. Step 6: Final answer
    x = 80,690.64

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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.