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Finding the Fourth Proportional to 162,791.78, 224,647.40 and 90,191.70

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Solution

The fourth proportional to 162,791.78, 224,647.40 and 90,191.70 is: 124,461.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,791.78 : 224,647.40 = 90,191.70 : x
  2. Step 2: Convert to fraction form
    162,791.78/224,647.40 = 90,191.70/x
  3. Step 3: Cross multiply
    162,791.78x = 224,647.40 × 90,191.70
  4. Step 4: Simplify right side
    162,791.78x = 20,261,330,906.58
  5. Step 5: Solve for x
    x = 20,261,330,906.58/162,791.78
  6. Step 6: Final answer
    x = 124,461.63

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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.