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Finding the Fourth Proportional to 137,379.71, 189,648.93 and 92,087.28

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Solution

The fourth proportional to 137,379.71, 189,648.93 and 92,087.28 is: 127,123.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,379.71 : 189,648.93 = 92,087.28 : x
  2. Step 2: Convert to fraction form
    137,379.71/189,648.93 = 92,087.28/x
  3. Step 3: Cross multiply
    137,379.71x = 189,648.93 × 92,087.28
  4. Step 4: Simplify right side
    137,379.71x = 17,464,254,301.54
  5. Step 5: Solve for x
    x = 17,464,254,301.54/137,379.71
  6. Step 6: Final answer
    x = 127,123.97

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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.