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Finding the Fourth Proportional to 138,990.20, 191,801.34 and 75,326.63

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Solution

The fourth proportional to 138,990.20, 191,801.34 and 75,326.63 is: 103,947.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,990.20 : 191,801.34 = 75,326.63 : x
  2. Step 2: Convert to fraction form
    138,990.20/191,801.34 = 75,326.63/x
  3. Step 3: Cross multiply
    138,990.20x = 191,801.34 × 75,326.63
  4. Step 4: Simplify right side
    138,990.20x = 14,447,748,571.68
  5. Step 5: Solve for x
    x = 14,447,748,571.68/138,990.20
  6. Step 6: Final answer
    x = 103,947.97

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1.5x scale

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.