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Finding the Fourth Proportional to 136,803.69, 205,276.59 and 103,513.86

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Solution

The fourth proportional to 136,803.69, 205,276.59 and 103,513.86 is: 155,324.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,803.69 : 205,276.59 = 103,513.86 : x
  2. Step 2: Convert to fraction form
    136,803.69/205,276.59 = 103,513.86/x
  3. Step 3: Cross multiply
    136,803.69x = 205,276.59 × 103,513.86
  4. Step 4: Simplify right side
    136,803.69x = 21,248,972,198.54
  5. Step 5: Solve for x
    x = 21,248,972,198.54/136,803.69
  6. Step 6: Final answer
    x = 155,324.55

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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.