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Finding the Fourth Proportional to 137,607.03, 189,721.92 and 89,123.31

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Solution

The fourth proportional to 137,607.03, 189,721.92 and 89,123.31 is: 122,876.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,607.03 : 189,721.92 = 89,123.31 : x
  2. Step 2: Convert to fraction form
    137,607.03/189,721.92 = 89,123.31/x
  3. Step 3: Cross multiply
    137,607.03x = 189,721.92 × 89,123.31
  4. Step 4: Simplify right side
    137,607.03x = 16,908,645,489.96
  5. Step 5: Solve for x
    x = 16,908,645,489.96/137,607.03
  6. Step 6: Final answer
    x = 122,876.32

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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.