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Finding the Fourth Proportional to 136,915.34, 188,936.42 and 76,473.95

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Solution

The fourth proportional to 136,915.34, 188,936.42 and 76,473.95 is: 105,530.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,915.34 : 188,936.42 = 76,473.95 : x
  2. Step 2: Convert to fraction form
    136,915.34/188,936.42 = 76,473.95/x
  3. Step 3: Cross multiply
    136,915.34x = 188,936.42 × 76,473.95
  4. Step 4: Simplify right side
    136,915.34x = 14,448,713,009.21
  5. Step 5: Solve for x
    x = 14,448,713,009.21/136,915.34
  6. Step 6: Final answer
    x = 105,530.28

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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.