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Finding the Fourth Proportional to 192,139.90, 288,209.85 and 133,090.90

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Solution

The fourth proportional to 192,139.90, 288,209.85 and 133,090.90 is: 199,636.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,139.90 : 288,209.85 = 133,090.90 : x
  2. Step 2: Convert to fraction form
    192,139.90/288,209.85 = 133,090.90/x
  3. Step 3: Cross multiply
    192,139.90x = 288,209.85 × 133,090.90
  4. Step 4: Simplify right side
    192,139.90x = 38,358,108,325.37
  5. Step 5: Solve for x
    x = 38,358,108,325.37/192,139.90
  6. Step 6: Final answer
    x = 199,636.35

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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.