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Finding the Fourth Proportional to 113,145.63, 169,718.44 and 28,905.97

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Solution

The fourth proportional to 113,145.63, 169,718.44 and 28,905.97 is: 43,358.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,145.63 : 169,718.44 = 28,905.97 : x
  2. Step 2: Convert to fraction form
    113,145.63/169,718.44 = 28,905.97/x
  3. Step 3: Cross multiply
    113,145.63x = 169,718.44 × 28,905.97
  4. Step 4: Simplify right side
    113,145.63x = 4,905,876,135.09
  5. Step 5: Solve for x
    x = 4,905,876,135.09/113,145.63
  6. Step 6: Final answer
    x = 43,358.95

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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.