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Finding the Fourth Proportional to 81,709.05, 112,713.11 and 75,929.48

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Solution

The fourth proportional to 81,709.05, 112,713.11 and 75,929.48 is: 104,740.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,709.05 : 112,713.11 = 75,929.48 : x
  2. Step 2: Convert to fraction form
    81,709.05/112,713.11 = 75,929.48/x
  3. Step 3: Cross multiply
    81,709.05x = 112,713.11 × 75,929.48
  4. Step 4: Simplify right side
    81,709.05x = 8,558,247,768.77
  5. Step 5: Solve for x
    x = 8,558,247,768.77/81,709.05
  6. Step 6: Final answer
    x = 104,740.51

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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.