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Finding the Fourth Proportional to 133,073.40, 199,379.70 and 86,302.20

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Solution

The fourth proportional to 133,073.40, 199,379.70 and 86,302.20 is: 129,303.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,073.40 : 199,379.70 = 86,302.20 : x
  2. Step 2: Convert to fraction form
    133,073.40/199,379.70 = 86,302.20/x
  3. Step 3: Cross multiply
    133,073.40x = 199,379.70 × 86,302.20
  4. Step 4: Simplify right side
    133,073.40x = 17,206,906,745.34
  5. Step 5: Solve for x
    x = 17,206,906,745.34/133,073.40
  6. Step 6: Final answer
    x = 129,303.88

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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.