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Finding the Fourth Proportional to 138,990.40, 191,827.37 and 88,007.88

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Solution

The fourth proportional to 138,990.40, 191,827.37 and 88,007.88 is: 121,463.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,990.40 : 191,827.37 = 88,007.88 : x
  2. Step 2: Convert to fraction form
    138,990.40/191,827.37 = 88,007.88/x
  3. Step 3: Cross multiply
    138,990.40x = 191,827.37 × 88,007.88
  4. Step 4: Simplify right side
    138,990.40x = 16,882,321,099.05
  5. Step 5: Solve for x
    x = 16,882,321,099.05/138,990.40
  6. Step 6: Final answer
    x = 121,463.94

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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.