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Finding the Fourth Proportional to 117,531, 162,192.78 and 67,230

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Solution

The fourth proportional to 117,531, 162,192.78 and 67,230 is: 92,777.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,531 : 162,192.78 = 67,230 : x
  2. Step 2: Convert to fraction form
    117,531/162,192.78 = 67,230/x
  3. Step 3: Cross multiply
    117,531x = 162,192.78 × 67,230
  4. Step 4: Simplify right side
    117,531x = 10,904,220,599.40
  5. Step 5: Solve for x
    x = 10,904,220,599.40/117,531
  6. Step 6: Final answer
    x = 92,777.40

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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.