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Finding the Fourth Proportional to 136,865.26, 205,303.65 and 66,803.50

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Solution

The fourth proportional to 136,865.26, 205,303.65 and 66,803.50 is: 100,208.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,865.26 : 205,303.65 = 66,803.50 : x
  2. Step 2: Convert to fraction form
    136,865.26/205,303.65 = 66,803.50/x
  3. Step 3: Cross multiply
    136,865.26x = 205,303.65 × 66,803.50
  4. Step 4: Simplify right side
    136,865.26x = 13,715,002,382.78
  5. Step 5: Solve for x
    x = 13,715,002,382.78/136,865.26
  6. Step 6: Final answer
    x = 100,208.06

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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.