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Finding the Fourth Proportional to 81,486.81, 112,449.67 and 45,679.14

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Solution

The fourth proportional to 81,486.81, 112,449.67 and 45,679.14 is: 63,036.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,486.81 : 112,449.67 = 45,679.14 : x
  2. Step 2: Convert to fraction form
    81,486.81/112,449.67 = 45,679.14/x
  3. Step 3: Cross multiply
    81,486.81x = 112,449.67 × 45,679.14
  4. Step 4: Simplify right side
    81,486.81x = 5,136,604,104.69
  5. Step 5: Solve for x
    x = 5,136,604,104.69/81,486.81
  6. Step 6: Final answer
    x = 63,036.02

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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.