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Finding the Fourth Proportional to 81,394.39, 112,320.97 and 47,403.91

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Solution

The fourth proportional to 81,394.39, 112,320.97 and 47,403.91 is: 65,415.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,394.39 : 112,320.97 = 47,403.91 : x
  2. Step 2: Convert to fraction form
    81,394.39/112,320.97 = 47,403.91/x
  3. Step 3: Cross multiply
    81,394.39x = 112,320.97 × 47,403.91
  4. Step 4: Simplify right side
    81,394.39x = 5,324,453,152.99
  5. Step 5: Solve for x
    x = 5,324,453,152.99/81,394.39
  6. Step 6: Final answer
    x = 65,415.48

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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.