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Finding the Fourth Proportional to 345,995.70, 518,990.40 and 109,338.36

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Solution

The fourth proportional to 345,995.70, 518,990.40 and 109,338.36 is: 164,006.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,995.70 : 518,990.40 = 109,338.36 : x
  2. Step 2: Convert to fraction form
    345,995.70/518,990.40 = 109,338.36/x
  3. Step 3: Cross multiply
    345,995.70x = 518,990.40 × 109,338.36
  4. Step 4: Simplify right side
    345,995.70x = 56,745,559,191.74
  5. Step 5: Solve for x
    x = 56,745,559,191.74/345,995.70
  6. Step 6: Final answer
    x = 164,006.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.