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Finding the Fourth Proportional to 108,640.40, 162,960.60 and 92,237.90

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Solution

The fourth proportional to 108,640.40, 162,960.60 and 92,237.90 is: 138,356.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,640.40 : 162,960.60 = 92,237.90 : x
  2. Step 2: Convert to fraction form
    108,640.40/162,960.60 = 92,237.90/x
  3. Step 3: Cross multiply
    108,640.40x = 162,960.60 × 92,237.90
  4. Step 4: Simplify right side
    108,640.40x = 15,031,143,526.74
  5. Step 5: Solve for x
    x = 15,031,143,526.74/108,640.40
  6. Step 6: Final answer
    x = 138,356.85

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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.