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Finding the Fourth Proportional to 58,578.76, 80,838.21 and 31,720.60

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Solution

The fourth proportional to 58,578.76, 80,838.21 and 31,720.60 is: 43,774.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,578.76 : 80,838.21 = 31,720.60 : x
  2. Step 2: Convert to fraction form
    58,578.76/80,838.21 = 31,720.60/x
  3. Step 3: Cross multiply
    58,578.76x = 80,838.21 × 31,720.60
  4. Step 4: Simplify right side
    58,578.76x = 2,564,236,524.13
  5. Step 5: Solve for x
    x = 2,564,236,524.13/58,578.76
  6. Step 6: Final answer
    x = 43,774.17

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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.