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Finding the Fourth Proportional to 136,501.80, 205,059.90 and 131,279.40

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Solution

The fourth proportional to 136,501.80, 205,059.90 and 131,279.40 is: 197,214.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,501.80 : 205,059.90 = 131,279.40 : x
  2. Step 2: Convert to fraction form
    136,501.80/205,059.90 = 131,279.40/x
  3. Step 3: Cross multiply
    136,501.80x = 205,059.90 × 131,279.40
  4. Step 4: Simplify right side
    136,501.80x = 26,920,140,636.06
  5. Step 5: Solve for x
    x = 26,920,140,636.06/136,501.80
  6. Step 6: Final answer
    x = 197,214.55

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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.