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Finding the Fourth Proportional to 108,604.80, 149,999.04 and 86,520.96

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Solution

The fourth proportional to 108,604.80, 149,999.04 and 86,520.96 is: 119,498.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,604.80 : 149,999.04 = 86,520.96 : x
  2. Step 2: Convert to fraction form
    108,604.80/149,999.04 = 86,520.96/x
  3. Step 3: Cross multiply
    108,604.80x = 149,999.04 × 86,520.96
  4. Step 4: Simplify right side
    108,604.80x = 12,978,060,939.88
  5. Step 5: Solve for x
    x = 12,978,060,939.88/108,604.80
  6. Step 6: Final answer
    x = 119,498.04

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1.5x scale

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.