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Finding the Fourth Proportional to 135,917.65, 187,559.99 and 75,491.98

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Solution

The fourth proportional to 135,917.65, 187,559.99 and 75,491.98 is: 104,175.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,917.65 : 187,559.99 = 75,491.98 : x
  2. Step 2: Convert to fraction form
    135,917.65/187,559.99 = 75,491.98/x
  3. Step 3: Cross multiply
    135,917.65x = 187,559.99 × 75,491.98
  4. Step 4: Simplify right side
    135,917.65x = 14,159,275,013.88
  5. Step 5: Solve for x
    x = 14,159,275,013.88/135,917.65
  6. Step 6: Final answer
    x = 104,175.40

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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.