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Finding the Fourth Proportional to 136,783.71, 188,758.36 and 76,359.94

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Solution

The fourth proportional to 136,783.71, 188,758.36 and 76,359.94 is: 105,374.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,783.71 : 188,758.36 = 76,359.94 : x
  2. Step 2: Convert to fraction form
    136,783.71/188,758.36 = 76,359.94/x
  3. Step 3: Cross multiply
    136,783.71x = 188,758.36 × 76,359.94
  4. Step 4: Simplify right side
    136,783.71x = 14,413,576,667.65
  5. Step 5: Solve for x
    x = 14,413,576,667.65/136,783.71
  6. Step 6: Final answer
    x = 105,374.95

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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.