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Finding the Fourth Proportional to 187,307, 281,019.74 and 67,281.72

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Solution

The fourth proportional to 187,307, 281,019.74 and 67,281.72 is: 100,943.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,307 : 281,019.74 = 67,281.72 : x
  2. Step 2: Convert to fraction form
    187,307/281,019.74 = 67,281.72/x
  3. Step 3: Cross multiply
    187,307x = 281,019.74 × 67,281.72
  4. Step 4: Simplify right side
    187,307x = 18,907,491,461.15
  5. Step 5: Solve for x
    x = 18,907,491,461.15/187,307
  6. Step 6: Final answer
    x = 100,943.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.