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Finding the Fourth Proportional to 135,156.39, 186,529.41 and 74,731.61

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Solution

The fourth proportional to 135,156.39, 186,529.41 and 74,731.61 is: 103,137.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,156.39 : 186,529.41 = 74,731.61 : x
  2. Step 2: Convert to fraction form
    135,156.39/186,529.41 = 74,731.61/x
  3. Step 3: Cross multiply
    135,156.39x = 186,529.41 × 74,731.61
  4. Step 4: Simplify right side
    135,156.39x = 13,939,642,189.00
  5. Step 5: Solve for x
    x = 13,939,642,189.00/135,156.39
  6. Step 6: Final answer
    x = 103,137.13

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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.