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Finding the Fourth Proportional to 135,304.25, 186,721.54 and 74,874.74

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Solution

The fourth proportional to 135,304.25, 186,721.54 and 74,874.74 is: 103,328.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,304.25 : 186,721.54 = 74,874.74 : x
  2. Step 2: Convert to fraction form
    135,304.25/186,721.54 = 74,874.74/x
  3. Step 3: Cross multiply
    135,304.25x = 186,721.54 × 74,874.74
  4. Step 4: Simplify right side
    135,304.25x = 13,980,725,639.11
  5. Step 5: Solve for x
    x = 13,980,725,639.11/135,304.25
  6. Step 6: Final answer
    x = 103,328.06

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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.