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Finding the Fourth Proportional to 81,889.76, 112,887.60 and 57,942.56

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Solution

The fourth proportional to 81,889.76, 112,887.60 and 57,942.56 is: 79,875.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,889.76 : 112,887.60 = 57,942.56 : x
  2. Step 2: Convert to fraction form
    81,889.76/112,887.60 = 57,942.56/x
  3. Step 3: Cross multiply
    81,889.76x = 112,887.60 × 57,942.56
  4. Step 4: Simplify right side
    81,889.76x = 6,540,996,536.26
  5. Step 5: Solve for x
    x = 6,540,996,536.26/81,889.76
  6. Step 6: Final answer
    x = 79,875.63

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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.