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Finding the Fourth Proportional to 81,432.99, 112,380.75 and 45,623.30

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Solution

The fourth proportional to 81,432.99, 112,380.75 and 45,623.30 is: 62,961.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,432.99 : 112,380.75 = 45,623.30 : x
  2. Step 2: Convert to fraction form
    81,432.99/112,380.75 = 45,623.30/x
  3. Step 3: Cross multiply
    81,432.99x = 112,380.75 × 45,623.30
  4. Step 4: Simplify right side
    81,432.99x = 5,127,180,109.57
  5. Step 5: Solve for x
    x = 5,127,180,109.57/81,432.99
  6. Step 6: Final answer
    x = 62,961.95

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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.