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Finding the Fourth Proportional to 123,438.70, 185,158.05 and 108,664.30

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Solution

The fourth proportional to 123,438.70, 185,158.05 and 108,664.30 is: 162,996.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,438.70 : 185,158.05 = 108,664.30 : x
  2. Step 2: Convert to fraction form
    123,438.70/185,158.05 = 108,664.30/x
  3. Step 3: Cross multiply
    123,438.70x = 185,158.05 × 108,664.30
  4. Step 4: Simplify right side
    123,438.70x = 20,120,069,892.62
  5. Step 5: Solve for x
    x = 20,120,069,892.62/123,438.70
  6. Step 6: Final answer
    x = 162,996.45

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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.