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Finding the Fourth Proportional to 135,068.35, 186,405.54 and 74,650.79

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Solution

The fourth proportional to 135,068.35, 186,405.54 and 74,650.79 is: 103,024.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,068.35 : 186,405.54 = 74,650.79 : x
  2. Step 2: Convert to fraction form
    135,068.35/186,405.54 = 74,650.79/x
  3. Step 3: Cross multiply
    135,068.35x = 186,405.54 × 74,650.79
  4. Step 4: Simplify right side
    135,068.35x = 13,915,320,821.38
  5. Step 5: Solve for x
    x = 13,915,320,821.38/135,068.35
  6. Step 6: Final answer
    x = 103,024.29

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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.