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Finding the Fourth Proportional to 136,076.63, 187,785.74 and 79,488.41

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Solution

The fourth proportional to 136,076.63, 187,785.74 and 79,488.41 is: 109,694.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,076.63 : 187,785.74 = 79,488.41 : x
  2. Step 2: Convert to fraction form
    136,076.63/187,785.74 = 79,488.41/x
  3. Step 3: Cross multiply
    136,076.63x = 187,785.74 × 79,488.41
  4. Step 4: Simplify right side
    136,076.63x = 14,926,789,153.07
  5. Step 5: Solve for x
    x = 14,926,789,153.07/136,076.63
  6. Step 6: Final answer
    x = 109,694.00

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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.