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Finding the Fourth Proportional to 108,638.40, 162,763.20 and 88,809.60

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Solution

The fourth proportional to 108,638.40, 162,763.20 and 88,809.60 is: 133,055.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,638.40 : 162,763.20 = 88,809.60 : x
  2. Step 2: Convert to fraction form
    108,638.40/162,763.20 = 88,809.60/x
  3. Step 3: Cross multiply
    108,638.40x = 162,763.20 × 88,809.60
  4. Step 4: Simplify right side
    108,638.40x = 14,454,934,686.72
  5. Step 5: Solve for x
    x = 14,454,934,686.72/108,638.40
  6. Step 6: Final answer
    x = 133,055.48

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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.