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Finding the Fourth Proportional to 239,172.78, 330,069.69 and 135,814.44

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Solution

The fourth proportional to 239,172.78, 330,069.69 and 135,814.44 is: 187,430.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,172.78 : 330,069.69 = 135,814.44 : x
  2. Step 2: Convert to fraction form
    239,172.78/330,069.69 = 135,814.44/x
  3. Step 3: Cross multiply
    239,172.78x = 330,069.69 × 135,814.44
  4. Step 4: Simplify right side
    239,172.78x = 44,828,230,108.32
  5. Step 5: Solve for x
    x = 44,828,230,108.32/239,172.78
  6. Step 6: Final answer
    x = 187,430.32

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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.