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Finding the Fourth Proportional to 79,521.18, 109,737.80 and 43,711.20

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Solution

The fourth proportional to 79,521.18, 109,737.80 and 43,711.20 is: 60,320.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,521.18 : 109,737.80 = 43,711.20 : x
  2. Step 2: Convert to fraction form
    79,521.18/109,737.80 = 43,711.20/x
  3. Step 3: Cross multiply
    79,521.18x = 109,737.80 × 43,711.20
  4. Step 4: Simplify right side
    79,521.18x = 4,796,770,923.36
  5. Step 5: Solve for x
    x = 4,796,770,923.36/79,521.18
  6. Step 6: Final answer
    x = 60,320.67

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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.