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Finding the Fourth Proportional to 79,521.90, 109,738.95 and 43,711.13

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Solution

The fourth proportional to 79,521.90, 109,738.95 and 43,711.13 is: 60,320.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,521.90 : 109,738.95 = 43,711.13 : x
  2. Step 2: Convert to fraction form
    79,521.90/109,738.95 = 43,711.13/x
  3. Step 3: Cross multiply
    79,521.90x = 109,738.95 × 43,711.13
  4. Step 4: Simplify right side
    79,521.90x = 4,796,813,619.94
  5. Step 5: Solve for x
    x = 4,796,813,619.94/79,521.90
  6. Step 6: Final answer
    x = 60,320.66

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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.