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Finding the Fourth Proportional to 137,103.13, 188,809.95 and 128,559.46

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Solution

The fourth proportional to 137,103.13, 188,809.95 and 128,559.46 is: 177,044.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,103.13 : 188,809.95 = 128,559.46 : x
  2. Step 2: Convert to fraction form
    137,103.13/188,809.95 = 128,559.46/x
  3. Step 3: Cross multiply
    137,103.13x = 188,809.95 × 128,559.46
  4. Step 4: Simplify right side
    137,103.13x = 24,273,305,214.63
  5. Step 5: Solve for x
    x = 24,273,305,214.63/137,103.13
  6. Step 6: Final answer
    x = 177,044.14

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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.