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Finding the Fourth Proportional to 81,381.52, 112,300.84 and 54,519.68

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Solution

The fourth proportional to 81,381.52, 112,300.84 and 54,519.68 is: 75,233.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,381.52 : 112,300.84 = 54,519.68 : x
  2. Step 2: Convert to fraction form
    81,381.52/112,300.84 = 54,519.68/x
  3. Step 3: Cross multiply
    81,381.52x = 112,300.84 × 54,519.68
  4. Step 4: Simplify right side
    81,381.52x = 6,122,605,860.53
  5. Step 5: Solve for x
    x = 6,122,605,860.53/81,381.52
  6. Step 6: Final answer
    x = 75,233.37

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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.