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Finding the Fourth Proportional to 135,078.62, 186,403.48 and 77,726.82

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Solution

The fourth proportional to 135,078.62, 186,403.48 and 77,726.82 is: 107,260.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,078.62 : 186,403.48 = 77,726.82 : x
  2. Step 2: Convert to fraction form
    135,078.62/186,403.48 = 77,726.82/x
  3. Step 3: Cross multiply
    135,078.62x = 186,403.48 × 77,726.82
  4. Step 4: Simplify right side
    135,078.62x = 14,488,548,669.25
  5. Step 5: Solve for x
    x = 14,488,548,669.25/135,078.62
  6. Step 6: Final answer
    x = 107,260.11

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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.