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Finding the Fourth Proportional to 84,250.56, 115,917.12 and 63,989.76

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Solution

The fourth proportional to 84,250.56, 115,917.12 and 63,989.76 is: 88,041.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,250.56 : 115,917.12 = 63,989.76 : x
  2. Step 2: Convert to fraction form
    84,250.56/115,917.12 = 63,989.76/x
  3. Step 3: Cross multiply
    84,250.56x = 115,917.12 × 63,989.76
  4. Step 4: Simplify right side
    84,250.56x = 7,417,508,688.69
  5. Step 5: Solve for x
    x = 7,417,508,688.69/84,250.56
  6. Step 6: Final answer
    x = 88,041.06

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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.