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Finding the Fourth Proportional to 81,479.72, 112,441.66 and 45,669.74

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Solution

The fourth proportional to 81,479.72, 112,441.66 and 45,669.74 is: 63,024.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,479.72 : 112,441.66 = 45,669.74 : x
  2. Step 2: Convert to fraction form
    81,479.72/112,441.66 = 45,669.74/x
  3. Step 3: Cross multiply
    81,479.72x = 112,441.66 × 45,669.74
  4. Step 4: Simplify right side
    81,479.72x = 5,135,181,377.37
  5. Step 5: Solve for x
    x = 5,135,181,377.37/81,479.72
  6. Step 6: Final answer
    x = 63,024.04

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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.