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Finding the Fourth Proportional to 81,330.99, 112,236.75 and 45,521

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Solution

The fourth proportional to 81,330.99, 112,236.75 and 45,521 is: 62,818.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,330.99 : 112,236.75 = 45,521 : x
  2. Step 2: Convert to fraction form
    81,330.99/112,236.75 = 45,521/x
  3. Step 3: Cross multiply
    81,330.99x = 112,236.75 × 45,521
  4. Step 4: Simplify right side
    81,330.99x = 5,109,129,096.75
  5. Step 5: Solve for x
    x = 5,109,129,096.75/81,330.99
  6. Step 6: Final answer
    x = 62,818.97

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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.