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Finding the Fourth Proportional to 129,999.30, 194,998.95 and 90,600.90

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Solution

The fourth proportional to 129,999.30, 194,998.95 and 90,600.90 is: 135,901.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,999.30 : 194,998.95 = 90,600.90 : x
  2. Step 2: Convert to fraction form
    129,999.30/194,998.95 = 90,600.90/x
  3. Step 3: Cross multiply
    129,999.30x = 194,998.95 × 90,600.90
  4. Step 4: Simplify right side
    129,999.30x = 17,667,080,369.06
  5. Step 5: Solve for x
    x = 17,667,080,369.06/129,999.30
  6. Step 6: Final answer
    x = 135,901.35

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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.