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Finding the Fourth Proportional to 108,611.30, 162,938.55 and 91,201.70

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Solution

The fourth proportional to 108,611.30, 162,938.55 and 91,201.70 is: 136,820.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,611.30 : 162,938.55 = 91,201.70 : x
  2. Step 2: Convert to fraction form
    108,611.30/162,938.55 = 91,201.70/x
  3. Step 3: Cross multiply
    108,611.30x = 162,938.55 × 91,201.70
  4. Step 4: Simplify right side
    108,611.30x = 14,860,272,755.54
  5. Step 5: Solve for x
    x = 14,860,272,755.54/108,611.30
  6. Step 6: Final answer
    x = 136,820.69

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1.5x scale

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.