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Finding the Fourth Proportional to 135,309.08, 186,726.89 and 74,883.89

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Solution

The fourth proportional to 135,309.08, 186,726.89 and 74,883.89 is: 103,339.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,309.08 : 186,726.89 = 74,883.89 : x
  2. Step 2: Convert to fraction form
    135,309.08/186,726.89 = 74,883.89/x
  3. Step 3: Cross multiply
    135,309.08x = 186,726.89 × 74,883.89
  4. Step 4: Simplify right side
    135,309.08x = 13,982,834,582.75
  5. Step 5: Solve for x
    x = 13,982,834,582.75/135,309.08
  6. Step 6: Final answer
    x = 103,339.96

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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.