Home / 138,905.84-208,139.88-107,392.80

Finding the Fourth Proportional to 138,905.84, 208,139.88 and 107,392.80

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Solution

The fourth proportional to 138,905.84, 208,139.88 and 107,392.80 is: 160,919.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,905.84 : 208,139.88 = 107,392.80 : x
  2. Step 2: Convert to fraction form
    138,905.84/208,139.88 = 107,392.80/x
  3. Step 3: Cross multiply
    138,905.84x = 208,139.88 × 107,392.80
  4. Step 4: Simplify right side
    138,905.84x = 22,352,724,504.86
  5. Step 5: Solve for x
    x = 22,352,724,504.86/138,905.84
  6. Step 6: Final answer
    x = 160,919.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.