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Finding the Fourth Proportional to 77,379.50, 106,802.69 and 47,181.45

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Solution

The fourth proportional to 77,379.50, 106,802.69 and 47,181.45 is: 65,121.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,379.50 : 106,802.69 = 47,181.45 : x
  2. Step 2: Convert to fraction form
    77,379.50/106,802.69 = 47,181.45/x
  3. Step 3: Cross multiply
    77,379.50x = 106,802.69 × 47,181.45
  4. Step 4: Simplify right side
    77,379.50x = 5,039,105,942.70
  5. Step 5: Solve for x
    x = 5,039,105,942.70/77,379.50
  6. Step 6: Final answer
    x = 65,121.97

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1.5x scale

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.