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Finding the Fourth Proportional to 135,436, 186,839.66 and 87,704.72

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Solution

The fourth proportional to 135,436, 186,839.66 and 87,704.72 is: 120,992.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,436 : 186,839.66 = 87,704.72 : x
  2. Step 2: Convert to fraction form
    135,436/186,839.66 = 87,704.72/x
  3. Step 3: Cross multiply
    135,436x = 186,839.66 × 87,704.72
  4. Step 4: Simplify right side
    135,436x = 16,386,720,065.20
  5. Step 5: Solve for x
    x = 16,386,720,065.20/135,436
  6. Step 6: Final answer
    x = 120,992.35

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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.