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Finding the Fourth Proportional to 108,560.22, 149,904.87 and 81,655.86

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Solution

The fourth proportional to 108,560.22, 149,904.87 and 81,655.86 is: 112,754.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,560.22 : 149,904.87 = 81,655.86 : x
  2. Step 2: Convert to fraction form
    108,560.22/149,904.87 = 81,655.86/x
  3. Step 3: Cross multiply
    108,560.22x = 149,904.87 × 81,655.86
  4. Step 4: Simplify right side
    108,560.22x = 12,240,611,078.04
  5. Step 5: Solve for x
    x = 12,240,611,078.04/108,560.22
  6. Step 6: Final answer
    x = 112,754.11

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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.