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Finding the Fourth Proportional to 135,169.84, 186,518.10 and 74,732.32

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Solution

The fourth proportional to 135,169.84, 186,518.10 and 74,732.32 is: 103,121.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,169.84 : 186,518.10 = 74,732.32 : x
  2. Step 2: Convert to fraction form
    135,169.84/186,518.10 = 74,732.32/x
  3. Step 3: Cross multiply
    135,169.84x = 186,518.10 × 74,732.32
  4. Step 4: Simplify right side
    135,169.84x = 13,938,930,334.99
  5. Step 5: Solve for x
    x = 13,938,930,334.99/135,169.84
  6. Step 6: Final answer
    x = 103,121.60

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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.