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Finding the Fourth Proportional to 81,579.88, 112,578.48 and 45,279.21

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Solution

The fourth proportional to 81,579.88, 112,578.48 and 45,279.21 is: 62,484.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,579.88 : 112,578.48 = 45,279.21 : x
  2. Step 2: Convert to fraction form
    81,579.88/112,578.48 = 45,279.21/x
  3. Step 3: Cross multiply
    81,579.88x = 112,578.48 × 45,279.21
  4. Step 4: Simplify right side
    81,579.88x = 5,097,464,276.62
  5. Step 5: Solve for x
    x = 5,097,464,276.62/81,579.88
  6. Step 6: Final answer
    x = 62,484.33

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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.