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Finding the Fourth Proportional to 135,494.66, 187,008.81 and 78,171.02

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Solution

The fourth proportional to 135,494.66, 187,008.81 and 78,171.02 is: 107,891.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,494.66 : 187,008.81 = 78,171.02 : x
  2. Step 2: Convert to fraction form
    135,494.66/187,008.81 = 78,171.02/x
  3. Step 3: Cross multiply
    135,494.66x = 187,008.81 × 78,171.02
  4. Step 4: Simplify right side
    135,494.66x = 14,618,668,491.64
  5. Step 5: Solve for x
    x = 14,618,668,491.64/135,494.66
  6. Step 6: Final answer
    x = 107,891.10

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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.