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Finding the Fourth Proportional to 187,368.42, 281,056.26 and 68,978.82

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Solution

The fourth proportional to 187,368.42, 281,056.26 and 68,978.82 is: 103,469.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,368.42 : 281,056.26 = 68,978.82 : x
  2. Step 2: Convert to fraction form
    187,368.42/281,056.26 = 68,978.82/x
  3. Step 3: Cross multiply
    187,368.42x = 281,056.26 × 68,978.82
  4. Step 4: Simplify right side
    187,368.42x = 19,386,929,168.41
  5. Step 5: Solve for x
    x = 19,386,929,168.41/187,368.42
  6. Step 6: Final answer
    x = 103,469.57

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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.