Home / 81,784.72-112,872.32-45,489.84

Finding the Fourth Proportional to 81,784.72, 112,872.32 and 45,489.84

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Solution

The fourth proportional to 81,784.72, 112,872.32 and 45,489.84 is: 62,781.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,784.72 : 112,872.32 = 45,489.84 : x
  2. Step 2: Convert to fraction form
    81,784.72/112,872.32 = 45,489.84/x
  3. Step 3: Cross multiply
    81,784.72x = 112,872.32 × 45,489.84
  4. Step 4: Simplify right side
    81,784.72x = 5,134,543,777.23
  5. Step 5: Solve for x
    x = 5,134,543,777.23/81,784.72
  6. Step 6: Final answer
    x = 62,781.21

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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.