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Finding the Fourth Proportional to 81,340.78, 112,250.28 and 45,530.80

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Solution

The fourth proportional to 81,340.78, 112,250.28 and 45,530.80 is: 62,832.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,340.78 : 112,250.28 = 45,530.80 : x
  2. Step 2: Convert to fraction form
    81,340.78/112,250.28 = 45,530.80/x
  3. Step 3: Cross multiply
    81,340.78x = 112,250.28 × 45,530.80
  4. Step 4: Simplify right side
    81,340.78x = 5,110,845,048.62
  5. Step 5: Solve for x
    x = 5,110,845,048.62/81,340.78
  6. Step 6: Final answer
    x = 62,832.51

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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.