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Finding the Fourth Proportional to 138,594.30, 191,260.60 and 74,932.56

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Solution

The fourth proportional to 138,594.30, 191,260.60 and 74,932.56 is: 103,407.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,594.30 : 191,260.60 = 74,932.56 : x
  2. Step 2: Convert to fraction form
    138,594.30/191,260.60 = 74,932.56/x
  3. Step 3: Cross multiply
    138,594.30x = 191,260.60 × 74,932.56
  4. Step 4: Simplify right side
    138,594.30x = 14,331,646,385.14
  5. Step 5: Solve for x
    x = 14,331,646,385.14/138,594.30
  6. Step 6: Final answer
    x = 103,407.18

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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.