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Finding the Fourth Proportional to 108,655.80, 162,983.70 and 66,665.40

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Solution

The fourth proportional to 108,655.80, 162,983.70 and 66,665.40 is: 99,998.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,655.80 : 162,983.70 = 66,665.40 : x
  2. Step 2: Convert to fraction form
    108,655.80/162,983.70 = 66,665.40/x
  3. Step 3: Cross multiply
    108,655.80x = 162,983.70 × 66,665.40
  4. Step 4: Simplify right side
    108,655.80x = 10,865,373,553.98
  5. Step 5: Solve for x
    x = 10,865,373,553.98/108,655.80
  6. Step 6: Final answer
    x = 99,998.10

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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.