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Finding the Fourth Proportional to 58,578.48, 80,838.16 and 31,720.99

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Solution

The fourth proportional to 58,578.48, 80,838.16 and 31,720.99 is: 43,774.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,578.48 : 80,838.16 = 31,720.99 : x
  2. Step 2: Convert to fraction form
    58,578.48/80,838.16 = 31,720.99/x
  3. Step 3: Cross multiply
    58,578.48x = 80,838.16 × 31,720.99
  4. Step 4: Simplify right side
    58,578.48x = 2,564,266,464.98
  5. Step 5: Solve for x
    x = 2,564,266,464.98/58,578.48
  6. Step 6: Final answer
    x = 43,774.89

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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.