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Finding the Fourth Proportional to 136,999.62, 205,358.46 and 65,815.38

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Solution

The fourth proportional to 136,999.62, 205,358.46 and 65,815.38 is: 98,655.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,999.62 : 205,358.46 = 65,815.38 : x
  2. Step 2: Convert to fraction form
    136,999.62/205,358.46 = 65,815.38/x
  3. Step 3: Cross multiply
    136,999.62x = 205,358.46 × 65,815.38
  4. Step 4: Simplify right side
    136,999.62x = 13,515,745,081.11
  5. Step 5: Solve for x
    x = 13,515,745,081.11/136,999.62
  6. Step 6: Final answer
    x = 98,655.35

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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.