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Finding the Fourth Proportional to 207,791.86, 286,685.25 and 127,135.30

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Solution

The fourth proportional to 207,791.86, 286,685.25 and 127,135.30 is: 175,405.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,791.86 : 286,685.25 = 127,135.30 : x
  2. Step 2: Convert to fraction form
    207,791.86/286,685.25 = 127,135.30/x
  3. Step 3: Cross multiply
    207,791.86x = 286,685.25 × 127,135.30
  4. Step 4: Simplify right side
    207,791.86x = 36,447,815,264.33
  5. Step 5: Solve for x
    x = 36,447,815,264.33/207,791.86
  6. Step 6: Final answer
    x = 175,405.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.