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Finding the Fourth Proportional to 107,991.54, 148,988.70 and 67,707

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Solution

The fourth proportional to 107,991.54, 148,988.70 and 67,707 is: 93,410.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,991.54 : 148,988.70 = 67,707 : x
  2. Step 2: Convert to fraction form
    107,991.54/148,988.70 = 67,707/x
  3. Step 3: Cross multiply
    107,991.54x = 148,988.70 × 67,707
  4. Step 4: Simplify right side
    107,991.54x = 10,087,577,910.90
  5. Step 5: Solve for x
    x = 10,087,577,910.90/107,991.54
  6. Step 6: Final answer
    x = 93,410.82

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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.